Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
BACKGROUND: The insecticide chlordecone was extensively used in the French West Indies to control banana root borer. Its persistence in soils has led to the widespread pollution of the environment, and human beings are still exposed to this chemical. Chlordecone has been shown to impair neurological and behavioural functions in rodents when exposed gestationally or neonatally. OBJECTIVES: The aim of the study was to evaluate the impact of prenatal and postnatal exposure to chlordecone on the cognitive, visual, and motor development of 7-month-old infants from Guadeloupe. METHODS: Infants were tested at 7 months (n=153). Visual recognition memory and processing speed were assessed with the Fagan Tests of Infant Intelligence (FTII), visual acuity with the Teller Acuity Card, and fine motor development with the Brunet-Lezine. Samples of cord blood and breast milk at 3 months (n=88) were analyzed for chlordecone concentrations. Postnatal exposure was determined through breast feeding and frequency of contaminated food consumption by the infants. RESULTS: Cord chlordecone concentrations in tertiles were associated with reduced novelty preference on the FTII in the highly exposed group (β=-0.19, p=0.02). Postnatal exposure through contaminated food consumption was marginally related to reduced novelty preference (β=-0.14, p=0.07), and longer processing speed (β=0.16, p=0.07). Detectable levels of chlordecone in cord blood were associated with higher risk of obtaining low scores on the fine motor development scale (OR=1.25, p<0.01). CONCLUSION: These results suggest that pre- and postnatal low chronic exposure to chlordecone is associated with negative effects on cognitive and motor development during infancy.
ISSN: 0013-9351

hal-00875939
https://hal.archives-ouvertes.fr/hal-00875939
DOI : 10.1016/j.envres.2012.07.006
PUBMED : 22910562

Éditeur(s) : ESPE de Martinique : Ecoles Supérieures du Professorat et de l'Education
Extrait de : "L'efficacité en éducation et en formation : définitions, pratiques et innovations" : journée d'étude, le 18 avril 2018. ESPE Martinique
Description : Pierre Lecefel, ATER en sciences de l'éducation parle d'une recherche qui se déroule à Rivière-Salée, au sein d'un centre de formation pour apprentis (CFA), qui mesure l'impact d'une modalité de formation utilisant l'entretien d'explicitation (Vermersch, 1994) sur le sentiment d'efficacité personnelle (SEP) des formateurs et des apprentis. Le SEP se définit comme « le jugement que porte une personne sur sa capacité d'organiser et d'utiliser les différentes activités inhérentes à la réalisation d'une tâche à exécuter » (Bouffard-Bouchard, Pinard, 1988, p. 411). Si un tel concept, développé dans le cadre de la théorie sociale cognitive (Bandura, 2007), suscite un intérêt croissant chez les chercheurs dans le domaine de l'éducation depuis de nombreuses années, c'est en partie parce que son influence sur les enseignants, sur leurs pratiques pédagogiques ainsi que sur la réussite de leurs élèves est largement démontrée (Skaalvik, Skaalvik, 2007). Dans cette étude, qui suit un paradigme quasi-expérimental, le SEP est utilisé comme moyen de mesure de l'efficacité d'une modalité de formation avec « entretien d'explicitation ». L'objectif est double, d'une part documenter le rôle de la verbalisation dans la construction de l'expérience des apprentis, d'autre part, juger de l'impact d'une approche centrée sur la personne sur le sentiment d'efficacité personnelle du formateur de CFA.

Droits : CC-BY-NC-ND - Attribution - Pas d'utilisation commerciale - Pas de modification
Permalien : http://www.manioc.org/fichiers/V18127
V18127

Éditeur(s) : HAL CCSD
Résumé : International audience
BACKGROUND: Several studies suggest that exposure to organophosphate insecticides (OP) during pregnancy impairs neurodevelopment in children. OBJECTIVES: We evaluated associations between biomarkers of prenatal and postnatal OP exposure and cognitive function of 6-year-olds in a French longitudinal birth cohort. METHODS: In 2002-2006, the PELAGIE mother-child cohort enrolled pregnant women from Brittany. For a random subcohort, we measured nonspecific dialkylphosphate metabolites (DAP) of OP in one maternal urine sample, collected before 19 weeks' gestation, and in one urine sample collected from their 6-year-old children. Six subtests of the Wechsler Intelligence Scale for Children-4th edition (WISC-IV) was administered at 6 years to evaluate cognitive function (n=231). Linear regression models controlling for factors including maternal intelligence and the Home Observation for Measurement of the Environment score were used. RESULTS: WISC-IV scores were not significantly associated with prenatal or childhood total DAP metabolites. WISC verbal comprehension score was significantly higher in association with the highest maternal urinary concentrations of diethylphosphate metabolites (DE) (5.5; 95% CI: 0.8, 10.3 for extgreater 13.2 nmol/L versus extlessLOQ), while WISC working memory score was significantly lower in association with the highest urinary concentrations of DE metabolites at age 6 years (-3.6; 95% CI: -7.8, -0.6 for extgreater 11.1 nmol/L versus extlessLOD). CONCLUSION: This study found no evidence that prenatal OP exposure adversely affected cognitive function in 6-year-olds, perhaps because of the higher population's socioeconomic status than in previous studies though other causal and non-causal explanations are also possible. The negative association between WISC score and concurrent DE urinary concentrations requires replication by longitudinal studies investigating childhood OP exposure
Environmental Health Perspectives

hal-01207282
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01207282
DOI : 10.1289/ehp.1409472
PUBMED : 26394442

Éditeur(s) : HAL CCSD
Résumé : International audience
How do we learn to communicate: how do we come to language or how does language come to us? Would it be a question of adaptation to the world by the act of speaking as suggested by J. Bernicot 1 (1992); would man benefit first and foremost from a genetic patrimony that enabled him to make use of language, as N. Chomsky (1985) points out by asking the existence of a competence related to generative mechanisms? J. Bruner (1996) proposes the idea of an education likely to "adapt a culture to the needs of its members and to adapt its members and their ways of learning to the needs of culture". 2. A / Motivations and objects An approach to mother-child relationships (master's thesis in developmental psychology 3, Miehakanda, 1998) has given me the opportunity to highlight the mediation of play in the structuring of relationships between the child with academic difficulties and his parents. The specific framework of this research-action was that of the educational and therapeutic care of children attending primary school (CE1-CLIS-CLAD) 4. These seven children (three girls / four boys) who were reported for various personality and behavioral disorders all had a lack of self-esteem and self-esteem affecting their relationships with those around them (peers, teachers ...).
Comment apprenons-nous à communiquer : comment venons-nous au langage ou comment le langage vient-il à nous ? Serait-ce une question d'adaptation au monde par l'action de parler comme le suggère J. Bernicot 1 (1992) ; l'homme bénéficierait-il prioritairement d'un patrimoine génétique le disposant à faire usage du langage, comme l'indique N. Chomsky (1985) en posant l'existence d'une compétence reliée à des mécanismes génératifs ? J. Bruner (1996) propose l'idée d'une éducation susceptible «d'adapter une culture aux besoins de ses membres et d'adapter ses membres et leurs manières d'apprendre aux besoins de la culture» 2. A/ Motivations et objets Une approche des relations mères-enfants (mémoire de maîtrise de psychologie du développement 3 ; Miehakanda, 1998) m'a donné l'occasion de mettre en évidence la médiation du jeu dans la structuration des rapports entre l'enfant rencontrant des difficultés scolaires et ses parents. Le cadre spécifique de cette recherche-action était celui des prises en charge éducatives et thérapeutiques d'enfants scolarisés à l'école primaire (CE1-CLIS-CLAD) 4. Ces sept enfants (trois filles / quatre garçons) qui étaient signalés pour diverses formes de troubles de la personnalité et du comportement éprouvaient tous un manque de confiance en soi et d'estime de soi affectant leurs rapports avec leur entourage (pairs ; enseignants…).
https://hal.univ-antilles.fr/tel-01658934

ISBN : Livre broché : ISBN-10: 3841633412 ISBN-13: 978-3841633415. 2015, pp 316
tel-01658934
https://hal.univ-antilles.fr/tel-01658934

Éditeur(s) : HAL CCSD
Résumé : International audience
The subterranean environment is often described as “extreme” and food poor. Laboratory experiments have shown that blind Mexican tetra Astyanax mexicanus (De Filippi, 1853) cavefish are better at finding food in the dark than surface fish. Several morphological and behavioural attributes that could foster this obvious adaptive response to cave environments have been described. Nonetheless, it is currently unknown what young cavefish actually eat in their natural cave environment. Our results from the Pachón cave in México during the dry and rainy season show that fry are efficient predators in their natural cave environment. Their primary food item is aquatic crustaceans. The guts of post-larval, pre-juvenile stage individuals (n=9) contained an average of 17.9 water fleas (Cladocera), copepods, ostracods, and isopods. Thus, the fry in this cave are well-fed. The Pachón cave environment does not appear to be “food poor” for juvenile cavefish. Food regimes change between post-larval and adult stages to become more dependent on partially decomposed material, guano, or detritus from the mud. We discuss the data with regards to our current developmental and genetic understanding of cavefish morphological and behavioural evolution, particularly regarding its enhanced Vibration Attraction Behaviour (VAB).
Subterranean Biology

hal-01432027
https://hal.archives-ouvertes.fr/hal-01432027
DOI : 10.3897/subtbiol.21.11046

Éditeur(s) : HAL CCSD American Academy of Pediatrics
Résumé : International audience
OBJECTIVE: To explore the relationship between prenatal hemoglobin (Hb) concentration and infant cognitive and motor functions. METHODS: Our prospective cohort study included 1-year-old children born to women enrolled at their first antenatal care (ANC) visit in Allada, Benin, before 29 weeks of pregnancy, within a trial comparing the efficacy of sulfadoxine-pyrimethamine and mefloquine. Hb concentrations of pregnant women were determined from venous blood samples collected at first and second ANC visits of at least 1-month interval and at delivery. Women were prescribed oral iron, folic acid, and anthelminthics after the first ANC visit. A total of 636 children (76.8% of eligible children) were assessed by trained research nurses for cognitive and motor functions by using the Mullen Scales of Early Learning. RESULTS: Prevalence of anemia (Hb extless 110 g/L) decreased from 67.0% at first ANC visit (mean gestational age [SD], 22.1 [4.0] weeks) to 38.4% at delivery. Mean (SD) Hb concentrations increased from 103.7 (12.3) at first ANC visit to 112.4 (14.1) at delivery. We observed a significant negative quadratic relationship between infant gross motor (GM) function and Hb concentration at first and second ANC visits. Thus, infant GM scores increased sharply with increasing maternal Hb concentration until 90 g/L where increasing GM was mild, and began to decline after 110 g/L. CONCLUSIONS: There appears to be an Hb concentration range that may be optimal for GM function of 1-year-old children. This may reflect the importance of physiologic hemodilution, which occurs after the second trimester until 34 weeks of gestation
ISSN: 0031-4005

hal-01163752
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01163752
PUBMED : 26055847
DOI : 10.1542/peds.2015-0491

Éditeur(s) : HAL CCSD Public Library of Science
Résumé : Aim The aim of the present study was to examine whether listening to music during warming-up might influence short-term maximal performance (STMP), cognitive anxiety, self-confidence, and enjoyment during Ramadan, and whether these affects might predict STMP. Methods Nine male physical education students (age: 21 ± 1.1 years; height: 1.8 ± 0.04 m; body mass: 83 ± 5 kg) volunteered to participate in the present study. A within-subjects design consisted of four experimental sessions: Two sessions occurred one week before Ramadan and two others took place during Ramadan. They were scheduled at 5 p.m. and were conducted as follows: After a 10-minute warm-up either with or without listening to music, each participant performed a 5-m multiple shuttle run test, after which he was asked to answer items intended to assess his affective state during the experimental task. Results Our findings revealed that STMP was lower during Ramadan than before Ramadan in the no-music condition. Additionally, it was found that STMP was higher in the music condition than in the no-music condition during Ramadan, and that STMP measured before Ramadan did not differ from that measured during Ramadan in the music condition. Regarding affects, the findings revealed that enjoyment was lower during Ramadan than before Ramadan in the music condition, and that cognitive anxiety was lower in the music condition than in the no-music condition before Ramadan. Self-confidence was not influenced by the experimental conditions. Conclusion This study showed that listening to music during warming-up not only would be beneficial for STMP in Ramadan fasters, but also would counteract the negative effects of Ramadan observance on STMP.
ISSN: 1932-6203

hal-01467699
https://hal-univ-paris10.archives-ouvertes.fr/hal-01467699
DOI : 10.1371/journal.pone.0136400

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
It is becoming clear that the female brain has an inherent plasticity that is expressed during reproduction. The changes that occur benefit the offspring, which in turn secures the survival of the mother’s genetic legacy. Thus, the onset of maternal motivation involves basic mechanisms from genetic expression profiles, to hormone release, to hormone-neuron interactions, all of which fundamentally change the neural architecture – and for a period of time that extends, interestingly, beyond the reproductive life of the female. Although multiple brain areas involved in maternal responses are discussed, this review focuses primarily on plasticity in the maternal hippocampus during pregnancy, the postpartum period and well into aging as it pertains to changes in cognition. In addition, the effects of prolonged and repeated stress on these dynamic responses are considered. The maternal brain is a marvel of directed change, extending into behaviors both obvious (infant-directed) and less obvious (predation, cognition). In sum, the far-reaching effects of reproduction on the female nervous system provide an opportunity to investigate neuroplasticity and behavioral flexibility in a natural mammalian model.
ISSN: 0018-506X

hal-01169791
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01169791
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01169791/document
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01169791/file/Neuroplasticity%20In%20The%20Maternal%20Hippocampus_accepted.pdf
DOI : 10.1016/j.yhbeh.2015.06.004

Éditeur(s) : HAL CCSD CNRS-Editions
Résumé : The links between education and technology had existed for a long time before the emergence of the socalled information and communication technologies. Their analysis comes within several fields of research such as computer science, education and cognitive sciences in addition to information and communication sciences (ICS),... ICS have obvious assets to speak for themselves: their interdisciplinary approaches enable them to connect the technical, social, semiotic and political levels. Besides, the goals and methods of information sciences fully intersect with those of communication sciences.
Les liens entre éducation et technique, bien antérieurs à l'apparition des «technologies de l'information et de la communication» (Tic), relèvent de plusieurs disciplines: informatique, sciences de l'éducation, sciences de la cognition et Sic... Les Sic ont des atouts: leurs approches interdisciplinaires permettent d'articuler les niveaux technique, social, sémiotique, politique et les objets et méthodes des sciences de l'information rejoignent pleinement ceux des sciences de la communication
ISSN: 0767-9513

edutice-00260703
https://edutice.archives-ouvertes.fr/edutice-00260703
https://edutice.archives-ouvertes.fr/edutice-00260703/document
https://edutice.archives-ouvertes.fr/edutice-00260703/file/HERMES_2004_38_191.pdf

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
Pyrethroid insecticides are widely used in agriculture and in homes. Despite the neurotoxicity of these insecticides at high doses, few studies have examined whether lower-level exposures could adversely affect children's neurodevelopment. The PELAGIE cohort included 3421 pregnant women from Brittany, France between 2002 and 2006. When their children reached their sixth birthday, 428 mothers from the cohort were randomly selected, successfully contacted and found eligible. A total of 287 (67%) mothers agreed to participate with their children in the neuropsychological follow-up. Two cognitive domains were assessed by the Wechsler Intelligence Scale for Children: verbal comprehension and working memory. Five pyrethroid and two organophosphate insecticide metabolites were measured in maternal and child first-void urine samples collected between 6 and 19 gestational weeks and at 6 years of age, respectively. Linear regression models were used to estimate associations between cognitive scores and urinary pyrethroid metabolite concentrations, adjusting for organophosphate metabolite concentrations and potential confounders. Maternal prenatal pyrethroid metabolite concentrations were not consistently associated with any children's cognitive scores. By contrast, childhood 3-PBA and cis-DBCA concentrations were both negatively associated with verbal comprehension scores (P-trend = 0.04 and P-trend < 0.01, respectively) and with working memory scores (P-trend = 0.05 and P-trend < 0.01, respectively). No associations were observed for the three other childhood pyrethroid metabolite concentrations (4-F-3-PBA, cis-DCCA, and trans-DCCA). Low-level childhood exposures to deltamethrin (as cis-DBCA is its principal and selective metabolite), in particular, and to pyrethroid insecticides, in general (as reflected in levels of the 3-PBA metabolite) may negatively affect neurocognitive development by 6 years of age. Whatever their etiology, these cognitive deficits may be of importance educationally, because cognitive impairments in children interfere with learning and social development. Potential causes that can be prevented are of paramount public health importance
ISSN: 0160-4120

hal-01162374
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01162374
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01162374/document
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01162374/file/Pyrethroid%20insecticide%20exposure.pdf
DOI : 10.1016/j.envint.2015.05.009

Éditeur(s) : HAL CCSD Frontiers
Résumé : International audience
o abstract
ISSN: 1663-4365

hal-01384003
https://hal.archives-ouvertes.fr/hal-01384003
DOI : 10.3389/fnagi.2016.00169
PUBMED : 27462266

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
Mixtures of polybrominated diphenyl ethers (PBDEs) are present in indoor environments. Studies of the developmental effects of exposure to these chemicals in large prospective mother-child cohorts are required, with data on prenatal exposure and long-term follow-up of the children. We aimed to investigate the relationship between prenatal and childhood exposure to PBDEs and neurodevelopment at the age of six years. We determined the levels of PBDEs and other neurotoxicants in cord blood and dust collected from the homes of children for 246 families included in the PELAGIE mother-child cohort in France. We assessed two cognitive domains of the six-year-old children using the Wechsler Intelligence Scale for Children-IV. Verbal comprehension scores were lower in children from homes with higher concentrations of BDE99 (βDetects < median_vs_NonDetects = −1.6; 95% CI: −6.1, 2.9; βDetects≥median_vs_NonDetects = −5.4; −9.9, −1.0; ptrend = 0.02) and of BDE209 (β2nd_vs₁st_tertile = −1.8; 95% CI: −6.1, 2.5; β3rd_vs₁st_tertile = −3.2; −7.5, 1.2; ptrend = 0.15) in dust, particularly for boys (ptrend = 0.02 and 0.04, respectively). Working memory scores seemed to be lower in children with higher BDE99 concentrations in dust (ptrend = 0.10). No association was observed with cord blood levels of BDE209. Our findings are in agreement with those of four previous studies suggesting adverse cognitive outcomes among children associated with early-life exposure to penta-BDE mixtures, and provide new evidence for the potential neurotoxicity of BDE209. Several countries are in the process of banning the use of PBDE mixtures as flame-retardants. However, these compounds are likely to remain present in the environment for a long time to come
ISSN: 0161-813X

hal-01286255
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01286255
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01286255/document
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01286255/file/Childhood%20exposure%20to%20polybrominated%20diphenyl-accepted.pdf
DOI : 10.1016/j.neuro.2016.03.002

Éditeur(s) : HAL CCSD
Résumé : International audience
Cet article prolonge le débat introduit dans l'article précédent de la rubrique « Innovations obsjectivées ». Il s'agit ici de discuter un certain nombre de thèmes autour de enseigner et apprendre afin que les apprentissages en sport collectif à l'école deviennent plus efficaces. A cet effet, nous allons examiner successivement comment les élèves apprennent, comment les professeurs enseignent et aussi comment enseigner pour que les élèves apprennent et retiennent. Dans une dernière partie, une discussion est menée autour de la question de l'égal accès de toutes et tous aux fondamentaux de la culture scolaire et sportive. Mots clés : sport collectif, connaissance, enseigner, apprendre, réussite Le développement des technologies et, en particulier, l'avènement de la société de l'information ont augmenté les possibilités d'accès des individus à l'information et au savoir. Mais, en même temps, tous ces phénomènes entraînent une modification des compétences à acquérir pour le travail ou les loisirs. La société du futur sera donc une société cognitive est-il souvent affirmé (Commission européenne, 1995) et c'est dans cette perspective que se place le rôle central de l'éducation et la formation. L'éducation physique et sportive a plus que jamais une place prépondérante à jouer dans une société où la sédentarité devient une menace. Aussi, dans cette deuxième partie, nous allons discuter un certain nombre de thèmes autour d'enseigner et apprendre afin que les apprentissages en sport collectif à l'école deviennent plus efficaces. A cet effet, nous allons examiner successivement comment les élèves apprennent, comment les professeurs enseignent et aussi comment enseigner pour que les élèves apprennent et retiennent. Enfin une discussion sera menée autour de la question de l'égal accès de toutes et tous aux fondamentaux de la culture scolaire et sportive.
eJRIEPS

hal-01620910
https://hal.univ-antilles.fr/hal-01620910
https://hal.univ-antilles.fr/hal-01620910/document
https://hal.univ-antilles.fr/hal-01620910/file/7.%20eJR%2040%20Gr%C3%A9haigne%20et%20al.%202.pdf

Éditeur(s) : HAL CCSD
Résumé : International audience
The French ministry of education introduced in 2005 the « organized returning of knowledge » (ROC) in the French baccalauréat as a tool to render more efficient the mathematical education at the end of secondary school. This article is based on an analysis of the ROC of the 2006 Antilles-Guyane baccalauréat, by the anthropological approach to didactics, which leads to the construction of its mathematical site. Through this analysis, some features of the ROC are discussed, such as its consistency (including from the view point of the institution) and the transparency of this evaluation.
L’introduction des restitutions organisées de connaissances (ROC) dans les épreuves du baccalauréat, à partir de 2005, est une réponse de l’institution à la volonté de rendre plus efficace l’enseignement en cycle terminal. Cet article s’appuie sur l’analyse de la ROC du sujet Antilles Guyane session 2006 par une approche anthropologique en proposant la construction de son site mathématique. Au travers de cet exemple sont interrogées certaines caractéristiques du concept ROC comme sa cohérence (notamment institutionnelle) et la transparence de cette évaluation.
Annales de didactique et de sciences cognitives

hal-01530860
https://hal.univ-antilles.fr/hal-01530860

Éditeur(s) : HAL CCSD Wiley
Résumé : International audience
With the growing use of selective serotonin reuptake inhibitor medications (SSRIs) for the treatment of depression during the perinatal period, questions have been raised about the longterm impact of these medications on development. We aimed to investigate how developmental SSRI exposure may alter affect-related behaviors and associated molecular processes in offspring using a rodent model of maternal stress and depression. For this purpose, prenatally stressed or non-stressed male offspring were exposed to fluoxetine (5 mg/kg/day) or vehicle, via lactation, until weaning. Primary results show that postnatal fluoxetine exposure differentially altered anxiety-like behavior by increasing anxiety in non-stressed offspring and decreasing anxiety in prenatally stressed offspring. In the hippocampus, developmental fluoxetine exposure decreased BDNF IV and TrkB mRNA expression. Prenatal stress alone also decreased escape behaviors and decreased hippocampal BDNF IV mRNA expression. These data provide important evidence for the long-term programming effects of early-life exposure to SSRIs on brain and behavior.
ISSN: 0012-1630

hal-01305478
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01305478
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01305478/document
https://hal-univ-rennes1.archives-ouvertes.fr/hal-01305478/file/Developmental%20SSRIs%2C%20anxiety%20and%20BDNF_accepted.pdf
DOI : 10.1002/dev.21385

Éditeur(s) : HAL CCSD
Résumé : International audience
In this paper, we describe a blood alcohol content estimation prototype based on a comportment analysis performed by artificial neural networks. We asked to subjects that had drunk alcohol to play a video-game after having measured their blood alcohol content with a breathalyser. A racing game was modified so that it could provide various data related to the use of the controls by the player. Using the collected data, we trained our neural network in order to be able to determine whether or not the subject had exceeded a blood alcohol content threshold. We also succeeded in estimating this blood alcohol content with a mean error of 0.1g/l. We could perform those estimations independently of the track played among the two ones used. It was also performed in "real time", e.g., using only the data collected within the last 10 seconds of playing.
Proceedings of the 2011 International Conference on Advances in Computer-Human Interactions
Gosier, Guadeloupe

Droits : info:eu-repo/semantics/OpenAccess
hal-00849971
https://hal.archives-ouvertes.fr/hal-00849971
https://hal.archives-ouvertes.fr/hal-00849971/document
https://hal.archives-ouvertes.fr/hal-00849971/file/article.pdf

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
Objectives: The purpose of the present study was to examine the mediational role of self-confidence and anxiety in the relationship between self-esteem and claimed self-handicapping in an achievement context. Design: To test this mediational role, the three-step procedure advocated by Baron and Kenny (1986) was used. Method: After hearing and reading about specific conditions of performing that were intended to favor invoking excuses for future poor performance, 68 competitive basketball players completed measures of self-esteem, anxiety (cognitive and somatic), self-confidence, and claimed self-handicapping. Then, they warmed-up and carried out a basketball task. Results: Self-esteem negatively predicted cognitive anxiety and positively predicted self-confidence. In turn, self-confidence negatively predicted claimed self-handicapping and mediated the relationship between self-esteem and claimed self-handicapping. Cognitive and somatic anxieties did not mediate the relationship between self-esteem and claimed self-handicapping. Together, these results suggest that individuals with low self-esteem use more claimed self-handicaps because they have lower self-confidence. Conclusion: These findings shed light on the psychological processes that lead people with low self-esteem to use strategies of claimed self-handicaps.
ISSN: 1469-0292

Droits : info:eu-repo/semantics/OpenAccess
hal-01343259
https://hal.univ-antilles.fr/hal-01343259
https://hal.univ-antilles.fr/hal-01343259/document
https://hal.univ-antilles.fr/hal-01343259/file/PSE%20Manuscript%2014.03.2011-HAL.pdf
DOI : 10.1016/j.psychsport.2011.05.008

Éditeur(s) : HAL CCSD
Résumé : International audience
The 20th Caribbean Academy of Sciences Biennal Meeting was held in Guadeloupe, FWI, on November 24 th to 26 th, 2016. It has gathered over 130 participants from more than 14 countries within or outside the Caribbean. In this booklet, you may find all abstracts form the scientific sessions, and the desciption of two round tables and three symposiums. Sessions were as followed :- Poster session- Mathematics and Informatics- Science Education- Physics of the Athmosphere- Medical Sciences (1)- Interface and Material Physics- Radiochemistry and Nuclear Medicine and Biomolecules- Interdisciplinary Oral Session- Biology- Hydrology and Hydrodynamics- Material and Environmental Chemistry- Medical Sciences (2)
https://hal.univ-antilles.fr/hal-01413318
Dehaies, Guadeloupe

hal-01413318
https://hal.univ-antilles.fr/hal-01413318
https://hal.univ-antilles.fr/hal-01413318v2/document
https://hal.univ-antilles.fr/hal-01413318/file/CAS_2016_Booklet.pdf

Éditeur(s) : HAL CCSD Nature Publishing Group
Résumé : International audience
Lateralization, i.e. the preferential use of one side of the body, may convey fitness benefits for organisms within rapidly-changing environments, by optimizing separate and parallel processing of different information between the two brain hemispheres. In coral reef-fishes, the movement of larvae from planktonic to reef environments (recruitment) represents a major life-history transition. This transition requires larvae to rapidly identify and respond to sensory cues to select a suitable habitat that facilitates survival and growth. This ‘recruitment’ is critical for population persistence and resilience. In aquarium experiments, larval Acanthurus triostegus preferentially used their right-eye to investigate a variety of visual stimuli. Despite this, when held in in situ cages with predators, those larvae that previously favored their left-eye exhibited higher survival. These results support the “brain’s right-hemisphere” theory, which predicts that the right-eye (i.e. left-hemisphere) is used to categorize stimuli while the left-eye (i.e. right-hemisphere) is used to inspect novel items and initiate rapid behavioral-responses. While these experiments confirm that being highly lateralized is ecologically advantageous, exposure to chlorpyrifos, a pesticide often inadvertently added to coral-reef waters, impaired visual-lateralization. This suggests that chemical pollutants could impair the brain function of larval fishes during a critical life-history transition, potentially impacting recruitment success.
ISSN: 2045-2322

Droits : http://creativecommons.org/licenses/by/
hal-01585550
http://hal.upmc.fr/hal-01585550
http://hal.upmc.fr/hal-01585550/document
http://hal.upmc.fr/hal-01585550/file/s41598-017-09381-0.pdf
DOI : 10.1038/s41598-017-09381-0

Éditeur(s) : HAL CCSD Public Library of Science
Résumé : International audience
In contrast to mammals that have limited proliferation and neurogenesis capacities, the Xenopus frog exhibit a great potential regarding proliferation and production of new cells in the adult brain. This ability makes Xenopus a useful model for understanding the molecular programs required for adult neurogenesis. Transcriptional factors that control adult neurogenesis in vertebrate species undergoing widespread neurogenesis are unknown. NeuroD1 is a member of the family of proneural genes, which function during embryonic neurogenesis as a potent neuronal differentiation factor. Here, we study in detail the expression of NeuroD1 gene in the juvenile and adult Xenopus brains by in situ hybridization combined with immunodetections for proliferation markers (PCNA, BrdU) or in situ hybridizations for cell type markers (Vimentin, Sox2). We found NeuroD1 gene activity in many brain regions, including olfactory bulbs, pallial regions of cerebral hemispheres, preoptic area, habenula, hypothalamus, cerebellum and medulla oblongata. We also demonstrated by double staining NeuroD1/BrdU experiments, after long post-BrdU administration survival times, that NeuroD1 gene activity was turned on in new born neurons during post-metamorphic neurogenesis. Importantly, we provided evidence that NeuroD1-expressing cells at this brain developmental stage were post-mitotic (PCNA-) cells and not radial glial (Vimentin+) or progenitors (Sox2+) cells.
ISSN: 1932-6203

hal-00877023
https://hal-univ-rennes1.archives-ouvertes.fr/hal-00877023
https://hal-univ-rennes1.archives-ouvertes.fr/hal-00877023/document
https://hal-univ-rennes1.archives-ouvertes.fr/hal-00877023/file/The_Neurogenic_Factor-accepted.pdf
DOI : 10.1371/journal.pone.0066487