Publications

Articles scientifiques

Publications du LECD sur son site HAL

  • [hal-03817593] Cross-species parallels in babbling: animals and algorithms
    17 octobre 2022
    One contribution of 21 to a theme issue 'Vocal learning in animals and humans'.
  • [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-01480089] The Still-Face: A Greater Challenge for Infants of Mothers With Borderline Personality Disorder
    1 mars 2017
    The main aim of this study was to ascertain whether infants as young as 3 months of age, whose mothers suffer from borderline personality disorder (BPD), are already at risk of greater dysregulation than infants of mothers without BPD when faced with a minor stressful experience. Nineteen mothers diagnosed with BPD and 41 controls with no history of psychopathology and their 3-month-old infants were observed using Tronick's Face-to-Face Still-Face paradigm. The authors found that infants whose mothers have BPD express less positive vocalizations and less nonautonomic self-regulation than infants of mothers with no psychopathology. The stress of the Still-Face episode affects their gaze and self-regulation behaviors more strongly than those of infants of controls. The Reunion episode seems particularly challenging for mothers with BPD, who show fewer smiles and an increase in intrusive behavior. Because infants and their mothers with BPD are already dysregulated at 3 months postpartum, envisaging very early intervention seems warranted.
  • [hal-01480091] The Human Nature of Culture and Education
    1 mars 2017
    Human cultures educate children with different strategies. Ancient hunter-gatherers 200,000 years ago, with bodies and brains like our own, in bands of a hundred well-known individuals or less, depended on spontaneous cooperative practice of knowledge and skills in a natural world. Before creating language, they appreciated beautiful objects and music. Anthropologists observe that similar living cultures accept that children learn in playful 'intent participation'. Large modern industrial states with millions of citizens competing in a global economy aim to instruct young people in scientific concepts and the rules of literacy and numeracy deemed important for employment with elaborate machines. Our psychobiological theories commonly assume that an infant starts with a body needing care and emotional regulation and a mind that assimilates concepts of objects by sensorimotor action and requires school instruction in rational principles after several years of cognitive development. Evidence from archeology and evolutionary anthropology indicates that Homo sapiens are born with an imaginative and convivial brain ready for the pleasure of shared invention and with a natural sense of beauty in handmade objects and music. In short, there are innate predispositions for culture for practicing meaningful habits and artful performances that are playfully inventive and seductive for companionship in traditions, and soon capable of grasping the clever purpose of shared tasks and tools. This knowledge of inventive human nature with esthetic and moral sensibilities has important implications for educational policy in our schools.
  • [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-01480097] Effects of Familiarity and Attentiveness of Partner on 6-Month-Old Infants' Social Engagement
    1 mars 2017
    This study presents an ecological experiment investigating 6-month-olds' social engagement. Results show that infants look and smile more at a socially attending distant partner than at an inattentive partner and that their looking and smiling behavior is different when the inattentive partner is their mother.
  • [hal-01480094] Expressive Timing in Infant-Directed Singing between 3 and 6 Months
    1 mars 2017
    This longitudinal study compared the temporal characteristics of maternal singing at 3 and then at 6 months. Infant-directed (ID) singing is claimed to have different functions in preverbal communication. However few studies have focused on the specific characteristics of ID singing that change across the first months of life. We aimed to explore these changes between 3 and 6 months because musical routines become prominent in the repertoire of games parents and infants spontaneously play during a period referred to as 'the period of games'. We focused specifically on expressive timing because it reflects how mothers dynamically adapt their singing to their infant's states of attention and involvement. We aimed to determine whether the expressive timing cues of maternal singing would be different at 3 and then at 6 months. To this end, the interactions of 18 mother-infant dyads were recorded while mothers were singing a popular French playsong for their infant at 3 and then at 6 months. Acoustic analyses revealed that mothers showed final-lengthening and tempo slowing for both age groups, but marked the ends of the hierarchical structural units of the song more saliently with their 6-month-olds. Unexpectedly, infant sex was also found to affect maternal singing: more exaggerated phrase-lengthening patterns were observed in singing to girls.
  • [hal-01480095] Live Maternal Speech and Singing Have Beneficial Effects on Hospitalized Preterm Infants
    1 mars 2017
    AIM: To study the effects of live maternal speaking and singing on physiological parameters of preterm infants in the NICU and to test the hypothesis that vocal stimulation can have differential effects on preterm infants at a behavioural level. METHODS: Eighteen mothers spoke and sang to their medically stable preterm infants in their incubators over 6 days, between 1 and 2 pm. Heart rate (HR), oxygen saturation (OxSat), number of critical events (hypoxemia, bradycardia and apnoea) and change in behavioural state were measured. RESULTS: Comparisons of periods with and without maternal vocal stimulation revealed significantly greater oxygen saturation level and heart rate and significantly fewer negative critical events (p < 0.0001) when the mother was speaking and singing. Unexpected findings were the comparable effects of maternal talk and singing on infant physiological parameters and the differential ones on infant behavioural state. CONCLUSION: A renewed connection to the mother's voice can be an important and significant experience for preterm infants. Exposure to maternal speech and singing shows significant early beneficial effects on physiological state, such as oxygen saturation levels, number of critical events and prevalence of calm alert state. These findings have implications for NICU interventions, encouraging maternal interaction with their medically stable preterm infants.
  • [hal-01478458] Langage adressé au bébé et exploration visuelle chez le bébé de 4,5 mois : mise en évidence d'un effet de genre
    28 février 2017
    Plusieurs recherches ont montré les liens entre le langage adressé au bébé (LAB) et l’attention visuelle du bébé. Le langage adressé au bébé (LAB) est une forme particulière de langage auquel le bébé est très tôt sensible et qui joue un rôle essentiel dans l’acquisition du langage et dans le développement sociocognitif en général. La présente recherche cherche à déterminer si le bébé explore des zones différentes du visage en fonction du langage qui y est associé. L’enjeu est de mieux appréhender les liens entre la manière dont l’adulte s’adresse au bébé et l’attention visuelle que le bébé lui porte en retour, liens essentiels dans la compréhension des interactions précoces. Sujets et méthode: L’échantillon est constitué de 18 bébés de 4,5 mois auxquels ont été présentées 4 séquences vidéo d’une femme parlant « bébé » ou « adulte » (diffusées avec et sans la bande sonore). Les données recueillies sont les temps de regard sur le visage présenté en distinguant la zone des yeux de celle de la bouche. L’exploration visuelle du bébé a été enregistrée au moyen d’un système de poursuite oculaire (Tobii 2150). Résultats et conclusion: Les résultats mettent en évidence une exploration visuelle plus importante lorsque le son accompagne l’image, et une préférence pour la zone des yeux, ainsi que plusieurs effets d’interaction impliquant tous les facteurs genre des bébés. Ces résultats soulèvent la question de l’intérêt qui doit être porté à la direction du regard vers le partenaire, le regard ayant une dimension particulière bien avant que le bébé ne soit théoriquement capable de « lire » un regard référentiel. Ils posent par ailleurs la question de l’impact du genre sur la nature même des interactions précoces. Une connaissance plus précise des informations qui focalisent l’attention visuelle du bébé en situation de communication et une meilleure connaissance de l’effet de genre permettrait de dépister de façon plus spécifique les troubles précoces de la communication et d’adapter efficacement leur prise en charge clinique. / 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-01586927] Update on Mental Health of Infants and Children of Parents Affected With Mental Health Issues
    13 septembre 2017
    This paper highlights the most recent publications, in the field of psychiatry, on offspring of patients with psychiatric illnesses such as schizophrenia and bipolar disorder, and then summarizes what we know about the progeny of adults with mood disorders, the most prevalent of parental disorders. Studies examining personality disorders and contextual factors such as stress and trauma are examined with a focus on the crucial question of development and attachment status in children. Findings converge to reveal that offspring of parents (generally mothers) with most major psychiatric disorders present a higher risk for all mental disorders, and a wide range of disorders are also found in children, adolescent, and finally adult offspring of mothers with mood and anxiety disorders. Developmental psychopathology and infant and child psychiatry have focused on early relationship formation through social interaction and attachment patterns as pathways affected by vulnerability or resilience factors. First year of life longitudinal studies following mothers and infants has shown that maternal psychopathology is positively correlated with higher risk of attachment issues. It would seem that pathology appears when adaptation to real-life contexts becomes difficult in association with an accumulation of negative individual characteristics and environmental circumstances. We suggest that in order to move forward psychiatry should embrace a developmental cascade model, which posits a cumulative pathway for the emergence of psychopathology in the developing child. We propose that we have sufficient knowledge today to start implementing multilevel approaches to enhance the health and mental health of the next generation.
  • [hal-01480090] Early Development of Turn-Taking in Vocal Interaction between Mothers and Infants
    1 mars 2017
    Infants are known to engage in conversation-like exchanges from the end of the second month after birth. These 'protoconversations' involve both turn-taking and overlapping vocalization.
  • [hal-01480087] The Roots of Turn-Taking in the Neonatal Period
    1 mars 2017
    Human newborns are cognitively and socially competent. Although they are sensitive to the presence of a social partner, little is known on the emergence of the ability to partake in social interaction. In this study we aimed to explore the roots of turn-taking in the neonatal period. We wished to highlight the way mothers' and newborns' vocalizations are organized in relation to each other in a face-to-face communication situation. We observed 15 mothers and their 2 to 4-day-old newborns while mothers were instructed to speak to them and infants were in a receptive behavioural state. We examined the temporal organization of maternal and newborn vocalization. Our results show that of all newborn vocalizations analysed, one third consisted of overlapping vocalizations with a maternal vocalization. Furthermore, among the 119 newborn vocalizations that followed a maternal vocalization, 68.9% occurred within the first second, and 26.9% were latched (occurring within the first 50\,ms). Indeed our study suggests that a 1-s window would be the correct window to appreciate social contingency in the neonatal period. Our study provides evidence that a turn-taking ability is already present at birth suggesting that turn taking, which depends on a tight coordination between interacting individuals, is a precocious human ability.
  • [hal-04500856] Toward a multimodal and continuous approach of infant-adult interactions
    12 mars 2024
    Abstract Adult-infant early dyadic interactions have been extensively explored by developmental psychologists. Around the age of 2 months, infants already demonstrate complex, delicate and very sensitive behaviors that seem to express their ability to interact and share emotions with their caregivers. This paper presents 3 pilot studies of parent-infant dyadic interaction in various set-ups. The first two present longitudinal data collected on two infants aged between 1 and 6 months and their mothers. We analyzed the development of coordination between them, at the motor and at the vocal level. The 3rd pilot study aims to explore interpersonal coordination in both vocal behavior and motor activity for one infant and his mother at 2, 4 and 6 months. These pilot studies however leave a number of questions open concerning developmental changes and infants’ progressive mastery of interaction. We identify areas worth examining and try to tease out specific issues that may help develop new methodological pathways for the study of early naturalistic social interaction. We assume that a continuous, rather than discrete, approach would better capture the changes taking place in the various communicative modalities, while also displaying each dyad’s specificity and the narrative dimension of social engagement between infants and caregivers.
  • [hal-01480098] What Lies behind Postnatal Depression: Is It Only a Mood Disorder?
    1 mars 2017
    Postnatal depression (PND) is a common condition that has been extensively researched specifically because of its negative impact on the mother-infant relationship. Psychiatric research has looked at comorbidity of major depressive disorder and found it to be strongly associated with Axis II disorders. This study's principal aim was to investigate whether there is a greater incidence of personality disorder (PD) among a PND population than among a non-PND population at 3 months postpartum. A secondary aim was to define the different types of PD. Depression was assessed with the Montgomery and Asberg Depression Rating Scale (MADRS), and PD was assessed with the Structured Interview for DSM-IV Personality Disorders (SIDP-IV) in 109 women with their 12-week-old infants. Twice as many depressed mothers had PD. The PND group presented a greater number of severe clinical symptoms than the nondepressed group (p < .002). Further research is necessary to reexamine the heterogeneity of PND and reassess its impact on infant development.
  • [hal-01480096] Sense and Synchrony: Infant Communication and Musical Improvisation
    1 mars 2017
    This paper explores the forms and functions of synchrony in two communicative contexts: jazz musicians' performances and vocal communication between mothers and infants. We present the view that musical expression is first and foremost a form of communication, involving socially distributed practices that enable a coordination of ideas, intentions and meanings. We report on studies in developmental psychology that have highlighted infants' early abilities to connect with others. Synchrony is quite possibly the most fundamental of these abilities, enabling flexible and affectionate social encounters. We go on to argue that synchrony grounds meaning and culture within interpersonal processes. Synchrony is, at heart, a semiotic process which can readily do without language. Cet article explore les formes et les fonctions de la synchronie dans deux contextes de communication : les performances entre musiciens de jazz et la communication vocale entre mères et nourrissons. Nous partons de l'idée que l'expression musicale est avant tout une forme de communication impliquant des pratiques qui sont socialement distribuées, permettant une coordination d'idées, d'intentions et de significations. Plusieurs travaux en psychologie du développement révèlent les compétences précoces qui permettent au bébé d'entrer en contact avec son entourage social. La synchronie est potentiellement la plus fondamentale de ces compétences puisqu'elle encourage les échanges flexibles et affectueux. Nous suggérons enfin que la synchronie ancre le sens et la culture à travers des processus interpersonnels. La synchronie constituerait ainsi un processus sémiotique qui peut tout à fait se défaire du langage.
  • [hal-04495671] Directional female preference for an exaggerated male trait in canary (Serinus canaria) song
    8 mars 2024
    Motor constraints on vocal production impose a trade–off between trill rate and frequency bandwidth within birdsong. We tested whether domesticated canary (Serinus canaria) females, reared either in acoustic isolation or in aviary conditions, had a preference for broad bandwidth songs with artificially increased syllable rates. The copulation solicitation display (CSD) was used as an index of female preference. As predicted, both naive and experienced females were especially responsive to syllables with a broad bandwidth emitted at an artificially increased rate. Female preference for supernormal stimuli provide support for the honest–signalling hypothesis and our results are consistent with recent findings indicating that production of song phrases maximizing both bandwidth and syllable rate may be a reliable indicator of male physical or behavioural qualities. We suggest that female preference for vocal emissions, which simultaneously maximize these two parameters, could be a widespread pattern within songbirds.
  • [hal-02326136] Corvids create novel causal interventions after all
    22 octobre 2019
    Using a novel paradigm, Tayloret al.[1] recently investigated whether NewCaledonian crows make causal interventions in comparison to 24-month-oldchildren. They view a causal intervention as the ability, after having onlyobserved a correlation between cause and effect, to produce a novel behaviouralpattern to recreate the same outcome. They conclude that New Caledoniancrows cannot make causal interventions, whereas most children can. Theyalso question whether any previous work has provided evidence for causalinterventions in corvids. We argue that their conclusions are prematurebecause of both methodological and theoretical limitations to their study, andbecause their analysis of previous work is ambiguous.
  • [hal-01478471] A Potential Role for Parasites in the Maintenance of Color Polymorphism in Urban Birds
    28 février 2017
    Urbanization is a major challenge for biodiversity conservation, yet the evolutionary processes taking place in urbanized areas remain poorly known. Human activities in cities set new selective forces in motion which need to be investigated to predict the evolutionary responses of animal species living in urban areas. In this study, we investigated the role of urbanization and parasites in the maintenance of melanin-based color polymorphism in the feral pigeon Columba livia. Using a correlative approach, we tested whether differently colored genotypes displayed alternative phenotypic responses to urbanization, by comparing body condition, blood parasite prevalence and parasite load between colored morphs along an urbanization gradient. Body condition did not vary with urbanization, but paler individuals had a higher body condition than darker individuals. Moreover, paler morphs were less often parasitized than darker morphs in moderately urbanized habitats, but their parasite prevalence increased with urbanization. In contrast, darker morphs had similar parasite prevalence along the urbanization gradient. This suggests that paler morphs did better than darker morphs in moderately urbanized environments but were negatively affected by increasing urbanization, while darker morphs performed equally in all environments. Thus, differently colored individuals were distributed non-randomly across the urban habitat and suffered different parasite risk according to their location (a gene-by-environment interaction). This suggests that melanin-based coloration might reflect alternative strategies to cope with urbanization via different exposure or susceptibility to parasites. Spatial variability of parasite pressures linked with urbanization may, thus, play a central role in the maintenance of plumage color polymorphism in this urban species.
  • [hal-03484132] French handlers’ perspectives on Animal-Assisted Interventions
    24 mai 2023
    BackgroundAnimal-Assisted Interventions (AAI) are well implemented in human healthcare, in France as elsewhere; yet there are still difficulties in characterizing these practices and misconceptions about their mechanisms - little is known about the French practice of AAI and about the human-animal team.ObjectivesThis study aims to characterize AAI by exploring their specificities through French handlers’ perspectives.Material and methodAn online survey addressed to French handlers working in AAI with mainly one dog was carried out. This research included questions about their practice in AAI (registration status, beneficiaries, and animals) and their background (training in AAI, training in the medico-social field, training in animal behavior). We then examined a phenomenological understanding of handlers’ definitions of their practice in AAI, their motivations to work with these approaches, and the expectations of the human-animal team. We used an open coding strategy and created major themes from their answers.Results111 handlers participated in this study. The quantitative data highlighted a heterogeneity of handlers' profiles and professional backgrounds, although most profiles had previous training in healthcare. Five themes characterizing AAI emerged from the qualitative analysis: (1) AAI as additional approaches to care settings, (2) AAI as person-centered approaches, (3) the complementarity between handlers and their animal(s), (4) the shared role of mediator, and (5) handlers’ beliefs about the human-animal relationship related to their personal experiences. This survey allowed us to understand how the French use AAI and its role in the care system.ConclusionThe benefits of AAI are numerous both for care settings and for the caregivers mainly by making the care more humane. AAI seem to put the wellbeing of beneficiaries and the relationship with the caregiver at the center of the care. The complementarity of the human-animal team is the common feature of these practices and is critical to their success. Future interdisciplinary studies are required to explore the particularities of these interspecific approaches and the differences between countries.
  • [hal-01604274] Negative impact of urban noise on sexual receptivity and clutch size in female domestic canaries
    26 mai 2020
    In oscines, male song stimulates female reproduction and females are known to adjust both their sexual preferences and their maternal investment according to song quality. Female domestic canaries are especially responsive to wide frequency bandwidth (4 kHz) male songs emitted with a high-repetition syllable rate and low minimal frequencies (1 kHz). We previously showed that low-frequency urban noise decreases female sexual responsiveness for these low-frequency songs (1–5 kHz) through auditory masking. Based on the differential allocation hypothesis, we predicted that urban noise exposure will equally affect female maternal investment. Using a crossover design, we broadcast low-frequency songs to females either in an overlapping noise condition or in an alternating noise condition. Females decreased both their sexual responsiveness and their clutch size in the overlapping noise treatment relative to the alternative noise treatment. No differences were found concerning egg size or egg composition (yolk and albumen mass, testosterone concentration). Due to our experimental design, we can exclude a general impact of noisy conditions and thereby provide evidence for a detrimental effect through masking on avian courtship and reproductive output. These results suggest that noisy conditions may also affect avian communication in outdoor conditions, which may partly explain field reports on noise-dependent breeding success and reduced breeding densities at noisy sites.
  • [hal-04243919] Amitié, intimité émotionnelle et rôles de sexe à l'adolescence
    17 octobre 2023
    La recherche porte sur l'intimité émotionnelle perçue par les adolescents en classes de 4ème ou 3ème dans leurs amitiés dyadiques. Les différences inter-sexes de perception du de l'intimité sont supposées résulter des rôles de sexe plutôt que refléter une supériorité des habiletés sociales des filles. On faisait l'hypothèse que les garçons perçoivent moins d'intimité que les filles dans l'amitié mono-sexuée, mais que garçons et filles ont la même perception de l'intimité dans l'amitié bisexuée. Des adolescents français de 13 à 14 ans ont rempli un questionnaire évaluant la perception de leurs amitiés. Les résultats confirment l'hypothèse. La discussion porte sur le rôle des expériences entre pairs dans ces résultats. Certaines implications pour la supervision éducative des groupes de pairs sont proposées.
  • [hal-04484251] Spontaneous tempo production in cockatiels (Nymphicus hollandicus) and jungle crows (Corvus macrorhyncos)
    29 février 2024
    Musical and rhythmical abilities are poorly documented in non-human animals. Most of the existing studies focused on synchronisation performances to external rhythms. In humans, studies demonstrated that rhythmical processing (e. g. rhythm discrimination or synchronisation to external rhythm) is dependent of an individual measure: the individual tempo. It is assessed by asking participants to produce an endogenous isochronous rhythm (known as spontaneous motor tempo) without any specific instructions nor temporal cue. In non-human animal literature, studies describing spontaneous and endogenous production of motor tempo without any temporal clue are rare. This exploratory study aims to describe and compare the spontaneous motor tempo of cockatiels and jungle crows. Data were collected on spontaneous beak drumming behaviours of birds housed in laboratory. Inter beak strokes intervals were calculated from sound tracks of videos. The analyses revealed that inter beak strokes intervals are non-randomly distributed intervals and are isochronous. Recorded spontaneous motor tempos are significantly different among some cockatiels. Since we could only conduct statistical analysis with one corvid, we cannot conclude about this species. Our results suggest that cockatiels and jungle crows have individual tempos, thus encouraging further investigations.
  • [hal-04035290] The Development of Gender Schemata About Heterosexual and Homosexual Others During Adolescence
    17 mars 2023
    Perceptions of heterosexual and homosexual individuals were investigated among 55 male and 60 female French 11.0–22.1 yr olds, divided into 3 mean age groups of 12-, 16-, and 20 yr olds. Participants described heterosexual and homosexual males and females with typical masculine and feminine personality traits. Overall, they perceived heterosexual males as having more masculine traits than homosexual males. The 16- and 20-yr-olds perceived homosexual males as more feminine than heterosexual males, whereas the reverse was observed in 12-yr-olds. Furthermore, the 1 2-yr-olds perceived heterosexual females as more feminine than homosexual females, a difference that disappeared in the older age groups. Results support the view of early adolescence as a crucial period in the development of gender schemata about sexually significant others.
  • [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-03482219] Développement ontogénétique de la cognition humaine : champs de recherche, méthodes et perspectives
    15 décembre 2021
    Dès son origine, l’étude du développement de la cognition humaine d’un point de vue ontogénétique, c’est-à-dire de la naissance jusqu’à l’âge adulte, a été soumise à des défis théoriques et méthodologiques. Cette revue de littérature propose un aperçu de la multiplicité des méthodes et des approches permettant l’étude du développement de la cognition humaine, ainsi que de leurs limites respectives. Dans un premier temps, nous exposerons les méthodes classiquement utilisées en psychologie du développement pour l’étude de la cognition chez le bébé et chez le jeune enfant. Dans la seconde partie de cet article, nous décrirons comment certains travaux de la psychologie du développement se sont orientés vers les problématiques liées à l’étude de l’évolution de la cognition humaine. Enfin, dans un troisième temps, nous nous intéresserons aux progrès scientifiques qui ont mené à l’apparition d’un nouveau champ de recherche intégrant l’intelligence artificielle : la robotique développementale. Nous conclurons cet article par une discussion sur les perspectives et enjeux pour l’étude du développement de la cognition humaine.
  • [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-02014219] Consistency of female preference for male song in the domestic canary using two measures: Operant conditioning and vocal response
    11 février 2019
    Variation of female preferences is often reported in the literature and could be related to an artefact derived from multiple different methods used. Thus, there is a need to evaluate the influence of different methods when assessing female preferences. The present study aims to compare female preferences obtained from an operant conditioning test and from female vocal responses to male song in the domestic canary (Serinus canaria). In an operant conditioning test, females had the possibility to choose between two keys; a peck on one key elicited a supposed very attractive canary song while a peck on the other key elicited a less attractive song. Meanwhile, female vocal responses were recorded. Our results revealed that female canaries preferred to peck on the key eliciting the attractive song and that they emitted more copulation calls in response to the attractive song compared to the less attractive song. This study shows the congruence of these two methods and further suggests that they are reliable to study female preferences in laboratory conditions.
  • [hal-01478456] Le cannibalisme sexuel : un instinct dévorant
    28 février 2017
    Sexe et nourriture ont souvent fait bon ménage. « Chair fraîche », « péché de chair », « orgie » ou « femme dévoreuse d'hommes » sont autant d'expressions qui traversent le discours populaire, la littérature ou le cinéma. Dans son film Maris et Femmes, Woody Allen décrivait ainsi une de ses ex-compagnes comme une femme « sexuellement carnivore ». Alors, le sexe peut-il aller jusqu'à la consommation du partenaire ? Chez l'être humain, ce n'est guère que chez les psychopathes comme le tristement célèbre Luka Rocco Magnotta, le « dépeceur de Montréal ». Mais chez les animaux, quelle hécatombe !
  • [hal-01181219] Song stability and neighbour recognition in a migratory songbird, the black redstart
    29 juillet 2015
    Territorial male songbirds have the ability to discriminate between the songs of their neighbours and those of strangers and for a few species it has been shown that they maintain this ability from one breeding season to the next. To better understand the acoustic basis of this long-term discrimination ability we studied song stability across two breeding seasons in a migratory songbird with high inter-annual return rates and territory stability, the black redstart, Phoenicurus ochruros. Strophe repertoires of 14 males (≥2 years old) were stable from one breeding season to the next and high strophe sharing occurred for males within the same group of houses or hamlets (81%) in contrast to only limited sharing between different hamlets (15%). However, subtle differences exist between the renditions of the same strophe sung by neighbouring males and these differences equally show an inter-annual stability, providing an acoustic basis for long-term discrimination abilities. Playback tests showed the existence of a strong dear-enemy effect: males reacted less aggressively to the familiar, often shared song of a neighbour than to a stranger unshared song and this pattern was maintained when birds returned from migration one year later. We discuss on one side the possible mechanisms leading to the observed patterns of song sharing and on the other side the significance of stable vocal signatures for neighbour recognition.
  • [hal-01478480] Horizontal Transmission of the Father's Song in the Zebra Finch (Taeniopygia Guttata)
    21 novembre 2017
    As is the case for human speech, birdsong is transmitted across generations by imitative learning. Although transfer of song patterns from adults to juveniles typically occurs via vertical or oblique transmission, there is also evidence of horizontal transmission between juveniles of the same generation. Here, we show that a young male zebra finch (Taeniopygia guttata) that has been exposed to its father during the sensitive period for song learning can lead a brother, that has never heard the paternal song, to imitate some sounds of the father. Moreover, song similarity between the two brothers was higher than the similarity measured between the paternal song and the song of the brother that had a week-long exposure to the father. We speculate that the phenomenon of within-generation song learning among juveniles may be more widespread than previously thought and that when a juvenile evaluates potential models for imitative learning, a sibling may be as salient as an adult.
  • [hal-02929991] Shared calls in repertoires of two locally distant gray parrots (Psittacus erithacus)
    9 novembre 2020
    Parrots belong to the handful of animal species capable of vocal production learning. They are considered to be open-ended learners with complex and variable vocalizations. It is not known, however, to what extent their repertoires are shared among individuals within a group or between vocally isolated individuals or groups. In study 1, we mapped the repertoire of four captive African gray parrots (Psittacus erithacus) using a combination of three acoustic analyses. In study 2, we compared the repertoire of two female African gray parrots from two different laboratories who had never been in vocal contact with each other or any member of the other parrot’s social group. Results of study 1 showed a relatively large agreement between all three methods used to analyze the vocalizations. Almost three quarters (72.8%) of categories determined by visual-acoustic analysis were confirmed by at least one of the two computer-aided methods used, i.e., by spectrographic cross-correlation and/or a multiparametric statistical method. In study 2, we found a relatively large proportion of calls shared between the repertoires of the two gray parrot subjects. Over half and over a fourth of calls produced by parrots with the smaller and the larger repertoire, respectively, were shared between the two. No previous study identified such a large proportion of intergroup shared calls within this parrot species. It seems that some calls tend to reappear in vocally isolated groups based on inherited predispositions, similarly as has been documented in songbirds.
  • [hal-04390049] Pigeons discriminate between human feeders
    12 janvier 2024
    Considered as plague in many cities, pigeons in urban areas live close to human activities and exploit this proximity to find food which is often directly delivered by people. In this study, we explored the capacity of feral pigeons to take advantage of this human-based food resource and discriminate between friendly and hostile people. Our study was conducted in an urban park. Pigeons were fed by two experimenters of approximately the same age and skin colour but wearing coats of different colours. During the training sessions, the two human feeders displayed different attitudes: one of the feeders was neutral and the second was hostile and chased away the pigeons. During the two test phases subsequent to the training phase, both feeders became neutral. Two experiments were conducted, one with one male and one female feeder and the second with two female feeders. In both experiments, the pigeons learned to quickly (six to nine sessions) discriminate between the feeders and maintained this discrimination during the test phases. The pigeons avoided the hostile feeder even when the two feeders exchanged their coats, suggesting that they used stable individual characteristics to differentiate between the experimenter feeders. Thus, pigeons are able to learn quickly from their interactions with human feeders and use this knowledge to maximize the profitability of the urban environment. This study provides the first experimental evidence in feral pigeons for this level of human discrimination.

Médias

ACTUALITES

2023/06/30 - Articles de Johana Ryšavá


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 ?

Ouvrages

Michel Kreutzer (2021), Folies Animales, Le Pommier, Paris.

Bernard Thierry & Michel Kreutzer (dir, 2021), Témoignages sur la naissance d’une science, Les développements de l’éthologie en France (1956-1990), ouvrage collectif, Presses Universitaires de Paris Nanterre.


Franck Péron (2011), L'intelligence des perroquets: l'hypothèse du cerveau social: Compétition et coopération chez les psittacidés, Editions universitaires européennes.



 

Mis à jour le 23 novembre 2023