Publications

Publications du LECD sur son site HAL

• [hal-04246761] Langage adressé au bébé et exploration visuelle chez le bébé de 4,5mois : mise en évidence d’un effet de genre

  17 octobre 2023

  Background & aim. – Infant directed speech (IDS) is a simplified form of language known to capture infant visual attention. IDS is an early form of communication to which infants are particularly sensitive beginning at birth and play an essential part in the acquisition of language and in the development of social cognition. The present research aims at determining whether an infant as young as 4.5 months explores different face zones of a person talking to her when the form of speech employed is either IDS or adult directed speech (ADS). We wish to bring more insight in the relation between the way an adult talks to an infant and the infant’s visual attention, such a relation being a central tenet to understanding early interactions. Methods. – Eighteen 4.5 month-old infants were presented videos of a woman talking either IDS or ADS, each video played with and without soundtrack. The total time focused respectively on eye areas and mouth area was collected with an eye-tracking system (Tobii 2150). Results and conclusion. – Results showed evidence of more visual exploration when the soundtrack was played as opposed to silence while exploration focused more on the eye area. Moreover, interaction effects were observed involving a gender effect. These results raise the question of the importance of infant’s gaze and attention directed to the face, and specifically to the eyes of the partner. Indeed, eyes of a talking face seem of great importance at 4.5 months of age, i.e., long before an infant is known to be able to interpret a referential gaze. Our results also add to the gender effect differences found in early interactions between infant and social partners. A better understanding of what infant attention focuses on in a communication-oriented situation, including infant gender impact, would not only help to detect early parent-infant communication distortions but add to a more adapted and efficient clinical follow-up.
• [hal-03861918] How’s my kitty? Acoustic parameters of cat-directed speech in human-cat interactions

  20 novembre 2022

  In Western cultures, humans tend to use a specific kind of speech when talking to their pets, characterised, from an acoustical point of view, by elevated pitch and greater pitch modulation. Pet-directed speech (PDS), which has been mainly studied in dogs, shares some acoustic features with infant-directed speech (IDS), used when talking to young children. The purpose of this study was to test the hypothesis that adult humans also modify characteristics of their voice when talking to a cat. We compared acoustic parameters of speech directed to cats (CDS) and speech directed to adult humans (ADS). In a first experiment, we compared ADS and CDS utterances of male and female participants, addressing cats through video recordings, under controlled laboratory conditions. Both men and women used a higher pitch (mean fundamental frequency, or mean F0) in CDS vs. ADS. The second experiment was conducted under conditions allowing direct cat-human interactions, in a cohort of women. Once again, mean F0 was significantly higher in CDS vs. ADS. Overall, these data confirm our hypothesis that humans change the way they speak when addressing a cat, mainly by increasing the pitch of their voice. Further research is needed to fully investigate specificities of this speech.
• [hal-01480085] Psychological Disorders and Ecological Factors Affect the Development of Executive Functions: Some Perspectives

  3 février 2021

  The links between deficits in executive functions (EFs) (e.g., mental flexibility, inhibition capacities, etc.) and some psychological disorders (e.g., anxiety and depressive disorders) have been investigated in the past decades or so.
• [hal-02887830] Tempo Discrimination in 3-and 4-year-old children: performances and threshold

  2 juillet 2020

  Durations of less than one second are involved in all kinds of activities, such as music perception or rhythmical production tasks. It is therefore important to know how short durations are processed at a young age. This study aims to define discrimination performance between 3-and 4-year-olds (tempo discrimination). The first 4 years of life are essential for cognitive development and there is little data concerning those years due to the extreme difficulty of finding methods to assess children's timing performances. Moreover, the results yielded by previous experiments are controversial. Our data revealed that discrimination performances improve significantly within only a few months. The discrimination data from 3 and 4 year-olds are compared to those from older children. The overall results are discussed in a developmental model context.
• [hal-01645042] Tempo Discrimination in 3- and 4-year-old children: performances and threshold

  22 novembre 2017

  Durations of less than one second are involved in all kinds of activities, such as music perception or rhythmical production tasks. It is therefore important to know how short durations are processed at a young age. This study aims to define discrimination performance between 3- and 4-year-olds (tempo discrimination). The first 4 years of life are essential for cognitive development and there is little data concerning those years due to the extreme difficulty of finding methods to assess children’s timing performances. Moreover, the results yielded by previous experiments are controversial. Our data revealed that discrimination performances improve significantly within only a few months. The discrimination data from 3 and 4 year-olds are compared to those from older children. The overall results are discussed in a developmental model context.
• [hal-04687928] Young children's difficulties in switching from rhythm production to temporal interval production (>1 s)

  4 septembre 2024

  In order to efficiently perform audio-motor coordination children must process event duration. It has recently been shown that duration processing in adults involves two distinct, or at least hierarchically interrelated, processes. The processing of durations ranging from a hundred milliseconds to around one second is well accounted for by the Scalar Timing Theory. For duration above one second, temporal processing in adults appears to be task-dependent. Performances in the range of a hundred millisecond durations are usually studied with auditory tempo tasks. In this study, we examine timing performance in children for a large range of durations, from 400 ms to 4 seconds, using the same experimental design. The procedure consists in a motor synchronization task. Overall, our results show that 5 year olds perform better than 3 year olds. However, durations greater than, 1500 ms are difficult to process, leading to increasing variability in produced intervals. Moreover, only a few children are able to produce very long duration intervals. The main finding of this study confirms the existence of a break in the region of 1500 ms when a repeated synchronization task is tested. Consistently with the adult literature, this finding suggests the existence of two duration-dependent timing processes when children have to coordinate their motor behavior to external events
• [hal-04133300] Young children’s difficulties in switching from rhythm production to temporal interval production (>1 s)

  19 juin 2023

  This study examined the young children's abilities to switch from rhythm production, with short inter-tap intervals (ITIs), to temporal interval production, with long ITI (>1 s), in a sensorimotor synchronization task. Children aged 3-and 5-year-olds were given six sessions of synchronization. In a control group, they had to synchronize their ITI to an inter-stimulus interval (ISI) of 4 s. In the experimental group, they must progressively increase their ITI for one session to the next (from 0.4 to 4.0-s ISI). Our results showed that the 5-yearolds produced longer ITI that the 3-year-olds in synchronization. However, the value of ITI in the 5-year-olds never exceeded 1.5 s, with more variable ITI in the control than in the experimental group. In addition, at 5 years, boys had more difficulties than girls in changing their tapping rhythm. These results suggest a temporal window in sensorimotor synchronization, beyond which the rhythm is lost and the synchronization becomes difficult.
• [hal-02887838] Régulation rythmique avant 4 ans : effet d'un tempo auditif sur le tempo moteur

  2 juillet 2020

  L'objectif de cette étude est d'analyser les capacités de l'enfant âgé de 1 ½ à 3 ½ ans à modifier son tempo moteur spontané (TMS) en fonction de tempi auditifs. Les résultats montrent que le TMS reste constant entre 1 ½ et 3 ½ ans et que, parallèlement, il devient plus régulier. Les enfants les plus âgés modifient leurs rythmes de frappes si le tempo auditif diffère d'au moins 20 % de leurs propres rythmes. La capacité des enfants à ralentir leurs rythmes de frappes se met en place plus tardivement que leur accéléra-tion. Enfin, les modifications du rythme de frappes induisent une modification équivalente du TMS mais transitoire.
• [hal-01645056] Spontaneous motor tempo and rhythmical synchronisation in 2½-and 4-year-old children

  22 novembre 2017

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• [hal-01644067] Influence of auditory tempo on the endogenous rhythm of non-nutritive sucking

  21 novembre 2017

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• [hal-05200672] Assessing flexibility in meaning and context in non‐human communication

  5 août 2025

  The concept of flexibility in communication is central to reconstructing the evolutionary history of language, and grappling with “contextual flexibility” in particular is pivotal to address implications for pragmatics‐first accounts of language evolution. Despite significant advances in the field, research is hindered by definitional inconsistencies and methodological gaps across modalities. We build on recent frameworks to propose further, detailed methods for studying contextual and functional variability, incorporating modality‐agnostic and standardised terminology to facilitate cross‐species comparisons. Our approach includes a detailed classification of communicative contexts and outcomes, offering practical methods to disentangle context from function and meaning. By integrating insights across behavioural ecology and comparative psychology, we aim to enhance the comparability of findings and provide a robust foundation for exploring the evolutionary trajectory of communicative flexibility and pragmatics.
• [hal-04952642] Context-Specific Arousal During Resting in Wolves and Dogs: Effects of Domestication?

  17 février 2025

  <div><p>Due to domestication, dogs differ from wolves in the way they respond to their environment, including to humans. Selection for tameness and the associated changes to the autonomic nervous system (ANS) regulation have been proposed as the primary mechanisms of domestication. To test this idea, we compared two low-arousal states in equally raised and kept wolves and dogs: resting, a state close to being asleep, and inactive wakefulness, which together take up an important part in the time budgets of wolves and dogs. We measured arousal via cardiac output in three conditions: alone, with a familiar human partner, or with pack members (i.e., conspecifics). Specifically, we compared heart rate (HR) and heart rate variability (HRV) of six wolves and seven dogs. As patterns of resting can vary adaptively, even between closely related species, we predicted that dogs would be generally more aroused than wolves, because living with humans may come with less predictable contexts than living with conspecifics; hence, dogs would need to be responsive at all times. Furthermore, we predicted that due to the effects of domestication, emotional social support by familiar people would reduce arousal more in dogs than in equally human-socialized wolves, leading to more relaxed dogs than wolves when away from the pack. Overall, we found a clear effect of the interactions between species (i.e., wolf versus dog), arousal state (i.e., resting or awake inactive) and test conditions, on both HR and HRV. Wolves and dogs were more aroused when alone (i.e., higher HR and lower HRV) than when in the presence of conspecifics or a familiar human partner. Dogs were more relaxed than wolves when at rest and close to a familiar human but this difference disappeared when awake. In conclusion, instead of the expected distinct overall differences between wolves and dogs in ANS regulation, we rather found subtle context-specific responses, suggesting that such details are important in understanding the domestication process.</p></div>
• [hal-05327470] Personality traits of aged dogs according to their cognitive status

  23 octobre 2025

  <div><p>Canine cognitive dysfunction (CCD) syndrome is a neurodegenerative condition that shares similarities with Alzheimer's disease (AD) in humans. In human studies, high neuroticism, low openness, and low extraversion have been significantly associated with AD diagnosis. Similarly, changes in dog behaviour, including alterations in personality, have been reported as common features in dogs with CCD, but no precise assessment of their changes has yet been realised. The aim of this study (based on the CaniAge cohort) was to compare characteristics of dogs with cognitive impairment (CI dogs) and non-CI dogs in a French senior dog population including owner-reported personality traits between dogs. Data were collected via an online survey, including the CADES scale (Canine Dementia Scale), the Monash Canine Personality Questionnaire, the Canine Owner-Reported Quality of Life (CORQ) assessment, and an environment questionnaire. Dogs aged of 6 years and older were included. Responses were obtained for 566 senior dogs of various breeds, with a median age of 9.86 years (Interquartile range: 8.08-11.98). Among them, 234 were classified as cognitively impaired, including 182 with mild impairment, 44 with moderate impairment, and 8 with severe impairment or dementia. Compared to non-CI dogs, CI dogs scored significantly lower on extraversion and amicability, and higher on neuroticism. After adjustment, CI dogs showed significantly lower amicability and higher neuroticism compared to non-CI dogs. This study is complementary of previous studies regarding CI-characteristics but is also the first to explore personality trait differences between CI and non-CI dogs, supporting observations previously reported in Alzheimer's disease research.</p></div>
• [hal-04389963] Can Infants Generalize Tool Use From Spoon to Rake at 18 Months?

  12 janvier 2024

  Infants start to use a spoon for self-feeding at the end of the first year of life, but usually do not use unfamiliar tools to solve problems before the age of 2 years. We investigated to what extent 18-month-old infants who are familiar with using a spoon for self-feeding are able to generalize this tool-use ability to retrieve a distant object. We tested 46 infants with different retrieval tasks, varying the tool (rake or spoon) and the target (toy or food). The tasks were presented in a priori descending order of difficulty: rake–toy condition, then either spoon–toy or rake–food, and finally spoon–food. Then, the same conditions were presented in reverse order to assess the transfer abilities from the easiest condition to the most difficult retrieval task. Spontaneously, 18-month-old infants performed the retrieval tasks better with the familiar tool, the easiest task being when the spoon was associated with food. Moreover, the transfer results show that being able to use a familiar tool in an unusual context seems necessary and sufficient for subsequent transfer to an unfamiliar tool in the unusual context, and that early and repetitive training of self-feeding with a spoon plays a positive role in later tool use.
• [hal-04498355] Social patterning of childhood overweight in the French national ELFE cohort

  11 mars 2024

  Abstract An inverse social gradient in early childhood overweight has been consistently described in high-income countries; however, less is known about the role of migration status. We studied the social patterning of overweight in preschool children according to the mother’s socio-economic and migration background. For 9250 children of the French ELFE birth cohort with body mass index collected at age 3.5 years, we used nested logistic regression to investigate the association of overweight status in children with maternal educational level, occupation, household income and migration status. Overall, 8.3% (95%CI [7.7–9.0]) of children were classified as overweight. The odds of overweight was increased for children from immigrant mothers (OR 2.22 [95% CI 1.75–2.78]) and descendants of immigrant mothers (OR 1.35 [1.04–2.78]) versus non-immigrant mothers. The highest odds of overweight was also observed in children whose mothers had low education, were unemployed or students, or were from households in the lowest income quintile. Our findings confirm that socio-economic disadvantage and migration status are risk factors for childhood overweight. However, the social patterning of overweight did not apply uniformly to all variables. These new and comprehensive insights should inform future public health interventions aimed at tackling social inequalities in childhood overweight.
• [hal-05240651] Association Between Parental Social Position and Childhood Overweight: Mediation by Lifestyle and BMI Patterns During Pregnancy

  4 septembre 2025

  In high-income countries, children born to parents with low socio-economic position (SEP) or with non-Western ethnicity are disproportionally affected by obesity as early as preschool age. We assessed how much of these associations were mediated by parental lifestyle and BMI patterns during pregnancy. We characterised 5-6 years old children with or without overweight from the French Etude Longitudinale Française depuis l'Enfance (ELFE) (n = 8584) and the Dutch Generation R birth cohorts (n = 6511). We used counterfactual mediation analyses to assess the potential mediating effect of previously identified lifestyle patterns: "high parental smoking, poor-quality maternal diet and sedentary behaviour" and "high parental body mass index and low gestational weight gain". Both patterns jointly mediated 62.8% of the association between parents' education level and childhood overweight in ELFE and 23.2% in Generation R. In Generation R, they jointly mediated 8.9% of the association between parents' geographic origin and childhood overweight. In ELFE, parents with non-Western backgrounds were less likely to follow the first pattern, resulting in a negative indirect effect. Parental lifestyle and BMI patterns during pregnancy seem key contributors to the early development of socio-economic inequalities in childhood overweight, while other yet unidentified factors may contribute to inequalities related to geographic origin. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
• [hal-04307298] Skin-to-skin SDF positioning: The key to intersubjective intimacy between mother and very preterm newborn—A pilot matched-pair case-control study

  21 mai 2024

  Background Skin-to-skin contact (SSC) has been widely studied in NICU and several meta-analyses have looked at its benefits, for both the baby and the parent. However, very few studies have investigated SSC’ benefits for communication, in particular in the very-preterm newborn immediately after birth. Aims To investigate the immediate benefits of Supported Diagonal Flexion (SDF) positioning during SSC on the quality of mother—very-preterm newborn communication and to examine the coordination of the timing of communicative behaviors, just a few days after birth. Subjects and study design Monocentric prospective matched-pair case-control study. Thirty-four mothers and their very preterm infants (27 to 31 + 6 weeks GA, mean age at birth: 30 weeks GA) were assigned to one of the two SSC positioning, either the Vertical Control positioning ( n = 17) or the SDF Intervention positioning ( n = 17). Mother and newborn were filmed during the first 5 min of their first SSC. Outcome measures Infants’ states of consciousness according to the Assessment of Preterm Infants’ Behavior scale (APIB). Onset and duration of newborns’ and mothers’ vocalizations and their temporal proximity within a 1-s time-window. Results In comparison with the Vertical group, very preterm newborns in the SDF Intervention Group spent less time in a drowsy state and more in deep sleep. At 3.5 days of life, newborns’ vocal production in SSC did not differ significantly between the two groups. Mothers offered a denser vocal envelope in the SDF group than in the Vertical group and their vocalizations were on average significantly longer. Moreover, in a one-second time-frame, temporal proximity of mother-very preterm newborn behaviors was greater in the SDF Intervention Group. Conclusion Although conducted on a limited number of dyads, our study shows that SDF positioning fosters mother-very preterm newborn intimate encounter during the very first skin to skin contact after delivery. Our pioneer data sheds light on the way a mother and her very preterm vocally meet, and constitutes a pilot step in the exploration of innate intersubjectivity in the context of very preterm birth.
• [hal-02450781] Sensus Communis: Some Perspectives on the Origins of Non-synchronous Cross-Sensory Associations

  2 décembre 2024

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• [hal-05483423] Advancing Biobehavioral Research: An Overview and Update from the University of São Paulo Twin Panel

  29 janvier 2026

  Abstract The Painel USP de Gêmeos (University of São Paulo Twin Panel) is, based at the Instituto de Psicologia da Universidade de São Paulo. It was formally established in 2017 to advance research on fundamental psychological processes through twin study designs. Our relatively new registry comprises a volunteer sample of 8839 twin individuals, 70% of whom live in Brazil’s Southeast, the region with the highest twinning birth rate (10.64‰) of the country, within a national population of 213 million. Our collaborative research group has expanded to include partners from psychology, dentistry, and medicine at USP, as well as other Brazilian institutions, such as the Universidade Federal do Rio Grande do Norte, Universidade Federal da Bahia, and Universidade Federal do Espírito Santo. We are advancing biobehavioral research in Brazil through innovative methodologies, interdisciplinary collaboration, and international partnerships. All twin participants contribute to multiple studies associated with four datasets employing the same hierarchical identification system for participants and families: the Biorepository, the Physiological and Physical Repository, the Behavioral Repository, and Fonoteca Cesar Ades (FOCA). Future directions include expanding our twin registry across the five regions of Brazil, our research partnerships, promoting genetic literacy, and fostering public engagement.
• [hal-05335666] First 1000 Days Strategies to Prevent Childhood Obesity: A Narrative Review and Recommendations From the EndObesity Consortium

  28 octobre 2025

  Childhood obesity remains a major global public health challenge, leading to significant short‐ and long‐term adverse health outcomes and imposing substantial societal costs. Recognising the critical importance of early intervention, the Horizon2020 EU‐funded JPI Consortium EndObesity has prioritised the first 1000 days of life, from preconception to 2 years of age, as a key window for obesity prevention strategies. This narrative review synthesises findings from the EndObesity Consortium, summarising evidence from large multi‐cohort studies on the influence of family‐based health behaviours in the first 1000 days on offspring obesity risk, the potential of childhood obesity prediction models in the first 1000 days, and strategies to enhance prenatal and postnatal interventions to prevent childhood obesity development. Finally, we present recommendations for research, practice, and policy to address the complex, multifaceted challenges of childhood obesity prevention in the first 1000 days.
• [hal-04045804] Adolescents’ Attachment to Parents and Peers: Links to Young Adulthood Friendship Quality

  25 mars 2023

  Few studies have been carried out on emerging adults' friendships and on their developmental roots. Research suggests that in adolescence, both attachment to parents and attachment to peers play a role in future socio-emotional development. The aim of the present study was to compare attachment in these two types of relationships in adolescence according to gender and test whether they respectively predicted the perception of best friendship in early adulthood. A sample of 83 participants (49 girls) was seen in early adolescence (M = 13.66 years, SD = 0.64) and 7 years later (mean age = 21.15 years, SD = 0.83). At T1, participants completed the Inventory of Parent and Peer Attachment, which measures attachment using three subscales (communication, alienation and trust) and one global security score. At T2, they completed the McGill Friendship Questionnaire. Results show that in adolescence, boys report higher security with parents compared to peers (mainly due to better communication), unlike girls who obtain higher scores with peers. Longitudinal findings reveal that alienation in the relation with parents is what best predicts friendship quality in early adulthood. These findings underline the specific internal working models at play in socio-emotional development and the way gender differences evolve from adolescence to early adulthood. Highlights: Contrary to female adolescents, males reported higher security with parents compared to peers (mainly due to better communication). Female adolescents reported better communication with peers than males. No gender difference in friendship quality in emerging adulthood was found. Results suggest that the progressive broadening of attachment from parents to peers occurs earlier for girls than for boys. Alienation in the relation with parents in early adolescence predicts friendship quality in early adulthood. [ABSTRACT FROM AUTHOR]
• [hal-04449525] Racial categorization and intergroup perception in preschool children: A focus on group membership and group size in the French context

  9 février 2024

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• [hal-04405861] Examining differences in minority versus majority preschoolers on social categorization and perceived intergroup distance

  19 janvier 2024

  Abstract We examined the differences between majority and minority children (i.e., group membership) on racial categorization and perceived cultural distance, among 4‐ to 6‐year‐old children, in low diversified schools. We used a spontaneous social categorization task using pictures of children from three different racial groups broadly represented in France (Europeans, Black‐, and North‐Africans), and an evaluation of the perceived cultural distance between participants' in‐group and the racial group represented in the picture, adapted to children and based on three factors (language, eating habits, and music). Results revealed an effect of age on racial categorization: the older the children, the more successful they are in this task. They showed a significant effect of the racial group represented in the photos on perceived cultural distance: members of minority groups (i.e., Black‐ and North‐Africans) were evaluated as more different compared to those of the majority group on each of the factors. Finally, we got an interaction between participants' in‐group and the racial group represented in the pictures, for the language factor: members of the majority group perceived as more different photographs representing minorities peers than those representing majority peers, while participants belonging to minority groups perceived no differences between photographs, according to the racial criteria.
• [hal-04449520] Racial Categorization and Intergroup Relations in Children: The Role of Social Status and Numerical Group Size

  9 février 2024

  The aim of this review was to examine the effect of social and numerical group size on racial categorization and intergroup relations in children. We first described the development of racial categorization and the factors that increase the saliency of the race criterion in different contexts. Then, we examine the role of social status in intergroups relations and show that low status children express lower ingroup favoritism compared to their peers from high status groups. Few studies investigated the role of ingroup size on intergroup biases. Here, we look at this numerical variable through the proportion of children of different racial groups in the school environment. The results show that homogeneous environments contribute to the decrease of bias and negative attitudes. We discuss how identifying specific and interactive effects of the social and numerical group size would allow us to implement early and efficient intervention programs.
• [hal-01244841] Sex Differences in Language Across Early Childhood: Family Socioeconomic Status does not Impact Boys and Girls Equally

  17 décembre 2015

  Child sex and family socioeconomic status (SES) have been repeatedly identified as a source of inter-individual variation in language development; yet their interactions have rarely been explored. While sex differences are the focus of a renewed interest concerning emerging language skills, data remain scarce and are not consistent across preschool years. The questions of whether family SES impacts boys and girls equally, as well as of the consistency of these differences throughout early childhood, remain open. We evaluated consistency of sex differences across SES and age by focusing on how children (N = 262), from 2;6 to 6;4 years old, from two contrasting social backgrounds, acquire a frequent phonological alternation in French – the liaison. By using a picture naming task eliciting the production of obligatory liaisons, we found evidence of sex differences over the preschool years in low-SES children, but not between high-SES boys and girls whose performances were very similar. Low-SES boys' performances were the poorest whereas low-SES girls' performances were intermediate, that is, lower than those of high-SES children of both sexes but higher than those of low-SES boys. Although all children's mastery of obligatory liaisons progressed with age, our findings showed a significant impeding effect of low-SES, especially for boys.
• [hal-01704484] Le nouveau-né, un partenaire pour sa mère. Analyse du discours maternel

  8 février 2018

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• [hal-03235566] Quel développement psychomoteur et social des bébés en Maison d’Accompagnement Parents Enfants (MAPE) ? Une question partagée des MAPE et de la pédopsychiatrie périnatale

  22 juillet 2024

  Quel développement psychomoteur et social des bébés en Maison d'Accompagnement Parents Enfants (MAPE) ? Une question partagée des MAPE et de la pédopsychiatrie périnatale What psychomotor and social development of babies in the parent and childcare center? A shared question of parent and childcare centers and perinatal child psychiatry
• [hal-03352104] Parental Perception of Vocal Contact with Preterm Infants: Communicative Musicality in the Neonatal Intensive Care Unit.

  23 septembre 2021

  In this study, we evaluate mothers' subjective experience of speaking and singing to their infants while they are in their incubators. We also discuss the relevance of the theoretical framework of Communicative Musicality for identifying the underlying mechanisms that may help explain its beneficial effects, both for parents and infants. Nineteen mothers talked and sung to their stable preterm infants in the incubators, for 5 min each, in three sessions over a period of 6 days. After each session, mothers were asked to assess in a self-report questionnaire the ease and the effectiveness of addressing their infants by speaking and singing and their prior musical experience. Perceived ease and effectiveness in communication were found to increase progressively from one session to the next. Mothers rated the speech to be increasingly more effective. This intuitive mean of interaction between parents and infants could be encouraged and supported by the nurses and the medical staff. Furthermore, individual musical experience affects perceived ease of communicating vocally with infants after a premature birth and should thus be encouraged during pregnancy.
• [hal-04510134] How’s my kitty? Acoustic parameters of cat-directed speech in human-cat interactions

  26 mars 2024

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• [hal-02326354] Comment le bébé accède-t-il à la notion d’outil ?

  22 octobre 2019

  L’utilisation d’un outil permet de dépasser les limites de son propre corps pour interagir avec l’environnement. Après avoir appris à contrôler sa main pour prendre des objets, le bébé découvre peu à peu qu’un objet peut permettre d’agir sur un autre objet. Dans cet article nous nous intéressons à la fonction particulière de l’outil qui permet de rapprocher un objet présenté hors de portée. Nous passons d’abord en revue les comportements précurseurs de cette habileté, comme l’utilisation de moyens intermédiaires pour atteindre un but secondaire (means-end), ainsi que les premières études consacrées à l’utilisation d’outil pour rapprocher un objet. Dans un deuxième temps nous posons la question des mécanismes sous-jacents à la découverte de cette utilisation de l’outil à partir des résultats d’une étude où nous avons suivi quatre bébés pendant près d’un an à partir de 12 mois en leur présentant un jouet hors de portée et un râteau à portée de main. Nos résultats montrent que les bébés mettent plusieurs séances avant de comprendre l’utilité du râteau, séances pendant lesquelles soit ils explorent le râteau, soit ils quémandent le jouet, soit ils associent le râteau et le jouet mais pas pour essayer de rapprocher le jouet. Ce n’est que vers 18 mois, relativement soudainement, que les bébés ont semblé comprendre que le râteau pouvait leur permettre de rapprocher le jouet. Au vu des résultats, nous concluons que les mécanismes « essai-erreur » et apprentissage par observation nécessitent un certain niveau d’intuition de la solution pour être efficaces, mais que l’intuition elle-même nécessite une longue phase d’exploration qui permet dans un premier temps à la fois d’améliorer la manipulation du râteau (qui devient un prolongement de la main ?) et d’en découvrir les affordances.
• [hal-02410311] Singing behind the stage: thrush nightingales produce more variable songs on their wintering grounds

  13 décembre 2019

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• [hal-04952306] Decreased risk-proneness with increasing age in equally raised and kept wolves and dogs

  17 février 2025

  A basic mechanism of domestication is the selection for fearlessness and acceptance of humans as social partners, which may affect risk-taking behavior and the ability to use humans as social support, both at the behavioural and physiological levels. We combined behavioural observations with heart rate parameters (i.e., HR and heart rate variability, HRV) in equally raised and housed wolves and dogs to assess the responses to food offered in the vicinity of a potential stressor (an unknown spinning object) with and without social support from a familiar human. Based on previous studies on neophobia in wolves and dogs, we expected dogs to be less scared of the object, approach more quickly, show less ambivalent behaviour, lower HR, and higher HRV, than wolves, especially at the presence of a human partner. However, we found that mainly age and the presence of a familiar human affected the behaviour of our subjects: older wolves and dogs were generally bolder and faster to approach the food and the familiar human’s presence increased the likelihood of taking it. HR rate parameters were affected by age and the stage of the test. Wolves and dogs showed particularly high HRs at the beginning and end of the test sessions. We conclude that in our paradigm, wolves’ and dogs’ risk-proneness varied with age, rather than species. Additionally, the presence of a familiar human increased the motivation of both, dogs and wolves to take the food.
• [hal-04307308] Fostering mother-very preterm infant communication during skin-to-skin contact through a modified positioning

  26 novembre 2023

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• [hal-00087299] Estimating the complexity of bird song by using capture-recapture approaches from community ecology

  21 juillet 2006

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• [hal-04931427] Ségrégation de sexe et socialisation entre élèves de collège au Cameroun : filles et garçons à part mais en accord sur la répartition des rôles sexués

  10 décembre 2025

  Le premier objectif était de savoir si à l’adolescence les relations entre élèves camerounais étaient marquées par la ségrégation de sexe. Le deuxième consistait à analyser dans quelle mesure les réputations de dominance et de prosocialité rendaient compte de l’acceptation sociale. 358 élèves de collège ont répondu à un questionnaire. Devant citer leurs préférés, ils ont choisi majoritairement des condisciples de leur sexe. Chez les filles les réputations de prosocialité et de dominance contribuent à l’acceptation sociale, chez les garçons seule leur réputation de prosocialité y contribue. On obtient les mêmes résultats en se centrant sur les citations provenant des pairs de même sexe. Ces résultats sont interprétés dans le contexte des rôles sexués au Cameroun.
• [hal-04559272] Vocal responsiveness of preterm infants to maternal infant-directed speaking and singing during skin-to-skin contact (Kangaroo Care) in the NICU.

  25 avril 2024

  Vocalizations of full-term newborns occur in a short latency time during the neonatal period. Contingent response time of preterm babies is still unknown. An increase of preterm babies’ vocalizations following exposure to parental speech was also observed. Mothers and babies co-modulate their vocalizations in preterm dyads. Purpose: To observe temporal features of maternal and infants’ vocalizations in speaking and singing conditions in preterm dyads. Methods: In a NICU mothers (N = 36) were invited to speak and to sing to their preterm infants during Kangaroo Care. Microanalysis of temporal units were performed with ELAN Software. Results and conclusions: Preterm infants vocalize less often while their mothers speak and sing than during baseline and their vocalizations tend to be more alternating in the speaking condition and more overlapping in the singing condition. It is also concluded that preterm infants take more time to respond to maternal speaking than to maternal singing.
• [hal-01480093] Pregnancy, Somatic Complaints and Depression: A French Population-Based Study

  1 mars 2017

  OBJECTIVE: Depression during pregnancy is today one of the greatest medical risks for expectant mothers and newborns. It is associated with numerous morbid conditions and with postnatal depression. Identifying depression during pregnancy is therefore a major public health concern, but screening for depression is not routinely carried out in somatic settings. We hypothesized that the presence of numerous somatic complaints contributes to the detection of an increased risk of depression during pregnancy. STUDY DESIGN: A cross-sectional study was conducted on 1000 consecutive pregnant women approached during OB/GYN visits at a general maternity hospital. They were asked to fill out a questionnaire, which contained the Edinburgh Postnatal Depression Scale (EPDS) and a checklist of 18 somatic complaints. RESULTS: The median number of somatic complaints was 5 (interquartile range 3-7). The risk of depression during the 2nd and 3rd trimesters was 18.3% (EPDS score > 10.5). Logistic regression revealed that when the somatic complaints total score moved from 3 to 7, the odds of moving from not-at-risk to at-risk for antenatal depression were multiplied by 2.91. CONCLUSION: Our results call for further research exploring somatic complaints and their link to depression during pregnancy. Until more knowledge is available, we suggest considering that women with a high number of somatic complaints during pregnancy are at high risk for depression and should be referred for further diagnostic clinical assessment and care.
• [hal-03509852] The emotions aroused by a vocational transition in adolescents: why, when and how are they socially shared with significant others?

  6 janvier 2022

  [...]
• [hal-04035198] Intensity seeking and novelty seeking: Their relationship to adolescent risk behavior and occupational interests

  17 mars 2023

  The aim of this study was to test the hypothesis that individual differences in sensation seeking account for adolescents' risk behavior and vocational interests. We relied on Arnett's (1994) conceptualization of sensation seeking as involving a need for intensity and a need for novelty, neither of which includes the willingness to take risks. Self-report scales measuring intensity seeking, novelty seeking, impulsiveness, risk behavior and vocational interest were administered to 636 adolescents. New scales measuring intensity seeking (IS) and novelty seeking (NS) were used. Regression analyses showed that IS and to a lesser extent NS accounted for a small part of variance of risk behavior, independent of impulsiveness. IS and NS accounted for vocational interests. The discussion emphasizes the importance of disentangling sensation seeking as a trait from willingness to take risks when one intends to analyse the effect of the former on risk behavior.
• [hal-05249036] Evaluation of the Factorial Structures of the Canine Behavioral Assessment and Research Questionnaire (C-BARQ) in France

  1 octobre 2025

  This study aimed to evaluate the factorial structure of the French version of the C-BARQ by analyzing the behaviour of 246 dogs, based on responses from 248 participants, in order to confirm its potential applicability in France. An exploratory factor analysis (EFA) identified 13 primary factors comprising 63 items, explaining 54.1 % of the total variance and a confirmatory factor analysis (CFA) revealed a good fit with the original US model. The French version of the C-BARQ mirrors the core structure of other validated versions, confirming its cross-cultural robustness, while also highlighting certain specificities. The emergence of the combined factor "Stranger-directed aggression/fear" suggests that non-expert respondents may have difficulty distinguishing between these two dimensions. Two new factors—"Passerby-directed aggression " and "Compulsive-like behaviour"—emerged, likely reflecting the characteristics of the study sample and the inclusion of the full set of items. Other notable differences include the clustering of certain attachment-related items with those related to energy, forming a new factor labeled "Social excitability/energy," as well as the absence of the "Dog rivalry" factor due to insufficient responses. Overall, the results indicate that the French version of the C-BARQ is a valid tool for assessing canine behaviour. However, cultural, contextual, and demographic differences should be considered when interpreting the findings. This study paves the way for future research on the factors influencing perceptions of canine behaviour and on the adaptation of psychometric instruments across cultural contexts.
• [hal-01478451] Intentional Gestural Communication and Discrimination of Human Attentional States in Rhesus Macaques (Macaca Mulatta)

  28 février 2017

  Pourquoi les femmes sont-elles sujettes à la ménopause ? Cette question reste en grande partie mystérieuse. Logiquement, les mécanismes biologiques de l'évolution font en sorte que les invididus ne vivent guère longtemps au-delà de leur période de procréation. La ménopause est ainsi rarissime, et ne se produit que dans l'espèce humaine, ainsi que chez deux cétacés : l'orque et le globicéphale. Ce qui a poussé les biologistes à s'intéresser aux orques, dans le but de comprendre pourquoi leurs femelles sont ménopausées. Des observations nouvelles viennent ainsi d'être réalisées et publiées par une équipe de chercheurs de l'Université d'Exeter en Grande-Bretagne associée à des spécialistes des baleines de l'État de Washington, aux États-Unis. Ces observations pourraient expliquer pourquoi les femelles de rares espèces (dont la nôtre) ont une durée de vie largement supérieure à leur période de reproduction. Les orques vivent en troupes d'une quinzaine d'individus unis par des liens sociaux riches et complexes. Remarquablement intelligentes, parfois qualifiées de « baleines tueuses », les femelles âgées tiennent une place particulière que l'on peut observer dans des scènes typiques de la vie de ces animaux, où une orque conduit par exemple ses fils et ses filles, déjà d'âge adulte, vers un banc de saumons. Les jeunes adultes, parfaitement capables de chasser, se laissent mener sur la trajectoire du banc de poissons, dont ils semblent ignorer l'emplacement exact. Tout se passe comme si la...
• [hal-01478446] Do Tonkean Macaques (Macaca Tonkeana) Tailor Their Gestural and Visual Signals to Fit the Attentional States of a Human Partner?

  28 février 2017

  Pourquoi les femmes sont-elles sujettes à la ménopause ? Cette question reste en grande partie mystérieuse. Logiquement, les mécanismes biologiques de l'évolution font en sorte que les invididus ne vivent guère longtemps au-delà de leur période de procréation. La ménopause est ainsi rarissime, et ne se produit que dans l'espèce humaine, ainsi que chez deux cétacés : l'orque et le globicéphale. Ce qui a poussé les biologistes à s'intéresser aux orques, dans le but de comprendre pourquoi leurs femelles sont ménopausées. Des observations nouvelles viennent ainsi d'être réalisées et publiées par une équipe de chercheurs de l'Université d'Exeter en Grande-Bretagne associée à des spécialistes des baleines de l'État de Washington, aux États-Unis. Ces observations pourraient expliquer pourquoi les femelles de rares espèces (dont la nôtre) ont une durée de vie largement supérieure à leur période de reproduction. Les orques vivent en troupes d'une quinzaine d'individus unis par des liens sociaux riches et complexes. Remarquablement intelligentes, parfois qualifiées de « baleines tueuses », les femelles âgées tiennent une place particulière que l'on peut observer dans des scènes typiques de la vie de ces animaux, où une orque conduit par exemple ses fils et ses filles, déjà d'âge adulte, vers un banc de saumons. Les jeunes adultes, parfaitement capables de chasser, se laissent mener sur la trajectoire du banc de poissons, dont ils semblent ignorer l'emplacement exact.
• [hal-05363829] Lifetime evolution of vocal repertoires in a songbird, the black redstart: a longitudinal field approach

  13 novembre 2025

  Oscine songbirds learn to sing mainly by imitating conspecific adults. Song learning programs are diverse, ranging from species that can only learn during the first months of life to species that are able to learn new songs throughout their lives. There is a paucity of longitudinal studies in the field on this matter. We investigated the changes of male strophe repertoires and strophe sharing over the lifetime, in a migratory population of a territorial songbird, the black redstart, Phoenicurus ochruros, by recording colour-ringed individuals during eight consecutive breeding seasons (2015–2022). We previously described the existence of microdialects between the different territorial male clusters (2–8 individuals breed in scattered patches of buildings). Three sets of time points were used to establish the time frame and to identify the types of changes males used to modify their repertoires. Males were recorded at their arrival from migration for their first breeding season (N = 52). We also followed 40 individuals during extended periods, most often covering their whole life: 25 were recorded on multiple occasions during their first breeding season and 24 were recorded during at least two breeding seasons. Most males kept their strophe repertoires stable throughout their lifetime (2–8 years). Those who shared only a few or no strophes with their neighbours when they first established their territories (14/40) changed their repertoires through: (1) addition of shared strophes, (2) selective attrition of unshared strophes and (3) gradual modification of syllables. All the repertoire changes resulted in an increase in song sharing with neighbours. Thus, black redstarts adapt their songs to their social environment mostly during the first breeding season but also throughout their lifetime. Our results support a continuum view of song plasticity and emphasize the necessity of long-term studies in order to understand the variability of song-learning processes.
• [hal-05363846] Individual benefits of nestling begging: experimental evidence for an immediate effect, but no evidence for a delayed effect

  14 novembre 2025

  The evolutionary stability of honest signalling by offspring is thought to require that begging displays be costly, so the costs and benefits of begging—and whether they are experienced individually or by the whole brood—are crucial to understanding the evolution of begging behaviour. Begging is known to have immediate individual benefits (parents distribute more food to intensely begging individuals) and delayed brood benefits (parents increase provisioning rate to the brood), but the possibility of delayed individual benefits (previous begging affects the current distribution of food) has rarely, if ever, been researched. We did this using playback of great tit Parus major chick begging and a control sound from either side of the nest. Male parents fed chicks close to the speaker more when great tit chick begging, but not other stimuli, was played back. In contrast, there was no effect of playback at the previous visit on the chicks that male parents fed. We have thus demonstrated an immediate individual benefit to begging, but found no evidence of a delayed individual benefit in this species.
• [hal-01704322] Social competition and plasma testosterone profile in domesticated canaries: An experimental test of the challenge hypothesis

  8 février 2018

  The challenge hypothesis predicts that plasma testosterone (T) concentration is high when male – male competitions are high and decreases when males are engaged in paternal care. In monogamous species, T concentration increases at the beginning of the breeding period and decreases after egg laying. According to the challenge hypothesis, increasing competition should also lead to T increase. The aim of our study was to test this hypothesis. In a first experiment, we measured the T profile of domesticated canaries housed with their mate in separated cages without competition. In a second one, we created a competition by housing male and female domestic canaries together (in an aviary) and emphasized this competition by limiting food access. We also studied social status effect. Our results showed no effect of social status in both sexes and no differences in female's T concentration. Concerning males, we obtained a clear monogamous T profile from the ones housed in a low competition situation and a polygamous profile from the others housed in high competition situation. Thus, our results support the hypothesis of the plasticity of the mechanisms controlling T concentration according to environmental conditions. D
• [hal-01478479] Comparisons of Different Methods to Train a Young Zebra Finch (Taeniopygia Guttata) to Learn a Song

  21 novembre 2017

  Like humans, oscine songbirds exhibit vocal learning. They learn their song by imitating conspecifics, mainly adults. Among them, the zebra finch (Taeniopygia guttata) has been widely used as a model species to study the behavioral, cellular and molecular substrates of vocal learning. Various methods using taped song playback have been used in the laboratory to train young male finches to learn a song. Since different protocols have been applied by different research groups, the efficiency of the studies cannot be directly compared. The purpose of our study was to address this problem. Young finches were raised by their mother alone from day post hatching (dph) 10 and singly isolated from dph 35. One week later, exposure to a song model began, either using a live tutor or taped playback (passive or self-elicited). At dph 100, the birds were transferred to a common aviary. We observed that one-to-one live tutoring is the best method to get a fairly complete imitation. Using self-elicited playback we observed high inter-individual variability; while some finches learned well (including good copying of the song model), others exhibited poor copying. Passive playback resulted in poor imitation of the model. We also observed that finches exhibited vocal changes after dph 100 and that the range of these changes was negatively related to their imitation of the song model. Taken together, these results suggest that social aspects are predominant in the success outcome of song learning in the zebra finch.
• [hal-01643606] Representation of Early Sensory Experience in the Adult Auditory Midbrain: Implications for Vocal Learning

  21 novembre 2017

  Vocal learning in songbirds and humans occurs by imitation of adult vocalizations. In both groups, vocal learning includes a perceptual phase during which juveniles birds and infants memorize adult vocalizations. Despite intensive research, the neural mechanisms supporting this auditory memory are still poorly understood. The present functional MRI study demonstrates that in adult zebra finches, the right auditory midbrain nucleus responds selectively to the copied vocalizations. The selective signal is distinct from selectivity for the bird's own song and does not simply reflect acoustic differences between the stimuli. Furthermore, the amplitude of the selective signal is positively correlated with the strength of vocal learning, measured by the amount of song that experimental birds copied from the adult model. These results indicate that early sensory experience can generate a long-lasting memory trace in the auditory midbrain of songbirds that may support song learning.
• [hal-03912933] Comments on “Postures of listening” by Victor A. Stoichita and Bernd Brabec de Mori

  26 décembre 2022

  [...]
• [hal-02159812] Finding good acoustic features for parrot vocalizations: The feature generation approach

  19 juin 2019

  [...]
• [hal-01696512] Closed-loop bird-computer interactions: a new method to study the role of bird callings

  30 janvier 2018

  [...]

ACTUALITES

2023/06/30 - Articles de Johana Ryšavá

• Infants can distinguish between sounds of different bird species, as discovered at the University of Nanterre
• Why should we fight for the education of our children?

2022/04/07 - Michel Kreutzer, sur France Culture (du 04/04/2022 au 07/04/2022 - disponible en podcast en intégralité dès le lundi après la diffusion du premier épisode), dans l'émission LSD -  Série documentaire "L'intelligence du vivant", de Franck Bessière, réalisée par Anne Fleury
1er épisode - "Définir le vivant" « Depuis pas mal d'années, on se rend compte que les êtres vivants, les organismes, notamment les vertébrés supérieurs, les oiseaux, les mammifères, recherchent également ce qui est source de plaisir. Un vivant, c'est donc aussi un être qui recherche des plaisirs et qui essaie d'éviter les déplaisirs. C'est une des raisons sans doute pour laquelle aujourd'hui, on donne tant d'importance à la souffrance animale et qu'on estime que l'on doit se donner des règles éthiques dans nos relations avec les animaux. »
2ème épisode - "L'humain un vivant d'exception"
3ème épisode - "Dans la tête des animaux" « Les émotions entrent pleinement dans les études éthologiques, qui ne se limitent donc plus seulement aux comportements. »
4ème épisode - "Le génie du vivant"

2022/03/30 - Michel Kreutzer, au Musée du Quai Branly - Université populaire 2021/2022, Thème 2 : Le corps - "L'"apprendre animal" : comment le savoir se transmet et s'apprend chez les animaux" 
2021/12/07 - Rana Esseily, Carla Aimé, Dalila Bovet et Maya Gratier, à la Philharmonie de Paris - Colloque "Pédagogie du chant choral" - "Résultats de l'étude scientifique -  impacts sur les capacités psychosociales, les apprentissages scolaires et le bien-être des enfants" (10h20)
https://philharmoniedeparis.fr/fr/activite/colloque/23002-pedagogie-du-chant-choral
2021/10/26 - Michel Kreutzer, sur France Inter, dans l’émission "Grand bien vous fasse" - "Autour des ‘Folies animales'"
2021/10/13 - Michel Kreutzer interviewé par Caroline Lachowski, sur RFI , dans l'émission "Autour de la question" - "La folie est-elle le propre de l’homme ?"
2021/10/11 - Rana Esseily sur France Culture, dans l'émission "La méthode scientifique" - "Rire : c’est du sérieux!"
2021/03/28 - Michel Kreutzer, interviewé par Octave Larmagnac-Matheron, dans Philosophie magazine - "Zoopsychiatrie : À la découverte des folies animales"
2021/03/25 - Michel Kreutzer, invité de l’association CVA (Connaissance et Vie d’Aujourd’hui) de Lille - Conférence "Éthologie : sommes-nous tous des bêtes ?"


ARCHIVES TELE / RADIO
2017/10/26 : France Infos junior - "Que se passe-t-il dans la tête des bébés ?"
2017/03/26 : France Inter - "Les Savanturiers" - en direct du salon du livre (à partir de 40 min 20) pour la promotion de La science à Contrepied paru aux éditions Belin.
2017/04/12 : France 3 - Le monde de Jamy : "Ces animaux si proches de nous"
2015/01/02 : France 5 - C dans l'air : "Mon chat est-il une personne ?"
2014/07/07 : France culture - Les matins d'été, 2ème partie : Les invités culture/Idées. "Malin comme un corbeau", avec deux éthologues Agatha Lievin-Bazin et Valérie Dufour (à partir de la 98ème minute).
2013/06 : NBC News - "Finches sing like birds and their dad taught them how"
2014/04 : France Culture - "L'intelligence du perroquet"
2013/10 : France Culture - Emission Continent Science : "L’homosexualité animale" (audio 54').
Cité des sciences et de l'industrie - Cycle de conférences Universciences "Corps et esprit : indissociables" : "Accéder à la vie subjective des animaux" - Michel Kreutzer.
2012/12 : The Telegraph "Parrot listens to Scissor Sisters' music".
2012/12 : France 5 - Emission "On n'est pas que des cobayes" : "Les éléphants ont-ils peur des souris".
2011/05 : France Inter - Emission "Vivre avec les bêtes", 29 mai :  http://www.franceinter.fr/em/vivre-avec-les-betes/105163 (05/2011)

ARCHIVES PRESSE ECRITE
2019/11/30 : The Economist - Male nightingales spend the winter practising.
2019/11/26 : New Scientist - Nightingales practise new songs in winter to impress mates in spring.
2017/03 :  Sciences Psy - Le tempo de notre quotidien - Et si nous prenions le temps ?, pp.30.
2014/12 : Santé magazine, n°469 sur l'empathie.
2014/09/03 : BMC - The unheard message of larksong.
2014/06 : JDD - L'intelligence des corbeaux
2013/11 : JDD - Comment les oiseaux apprennent-ils à chanter ?
2012/03&04 : Cerveau&Psycho - Le perroquet mentaliste.
2011 : Le Pigeon en Ville - La vie sociale du pigeon Bizet.
2011/12 : Le Républicain Lorrain - Les pigeons sont physionomistes.
2011/08 : Futura Sciences -  Les canaris font leur show... et s'adaptent à leur public !
2011/08 : Les Echos - Le perroquet, une langue et un cerveau.
2011/05 : BBC News - Parrots choose to work together.
2011/05 : Maxisciences - Intelligence du perroquet gris : collaboration et personnalité.
2011/05 : PhysOrg - Parrots display teamwork and decision-making skills.
2009/04 : Science Actualité, Universciences - Des piafs malins comme des singes.
2005/02 : BBC News - Sleep helps birds sing better.
A good night's sleep helps young birds master the art of singing, but only after a rather groggy start, Nature magazine has reported.
Savoirs Essonne - Masculin/féminin : le genre existe-t-il chez les animaux ?

Contribution de Laurent Nagle : "Les lions et les lionnes : des prédateurs aux moeurs parfois surprenantes" et  "L'antiquité gréco-romaine : un foyer d'anti-spécistes avant l'heure ?"
Le lion dans le pourtour méditerranéen sous la direction de Margaux Spruyt et Véronique Vassal - journées d'études du 11 & 12 mai 2023 à l'Institut Catholique de Paris. Editions du Cerf, janvier 2025