Native and cross-language speech sounds: some perceptual processes

Using a developmental approach, two aspects of debate in the speech perception literature were tested, (a) the nature of adult speech processing, the dichotomy being along nonlinguistic versus linguistic lines, and (b) the nature of speech processing by children of different ages, the hypotheses here implying in infancy detector-like processes and at age four "adult-like" speech perception reorganizations. Children ranging in age from 4 up to 18 years discriminated native and foreign speech contrasts. Results confirm the hypotheses for adults. It is clear that different processes are operating at different ages; however, more complex processes may come into play around the ages of 6 to 10 years; boys may use different strategies than girls, and with age, a multiplicity of processes may be concurrently active.     

ACOUSTIC ANALYSIS OF ORAL PRODUCTIONS OF INFANTS LATER DIAGNOSED WITH AUTISM AND THEIR MOTHER

Research on early signs of autism in social interactions often focuses on infants’ motor behaviors; few studies have focused on speech characteristics. This study examines infant‐directed speech of mothers of infants later diagnosed with autism (LDA; n = 12) or of typically developing infants (TD; n = 11) as well as infants’ productions (13 LDA, 13 TD). Since LDA infants appear to behave differently in the first months of life, it can affect the functioning of dyadic interactions, especially the first vocal productions, sensitive to expressiveness and emotions sharing. We assumed that in the first 6 months of life, prosodic characteristics (mean duration, mean pitch, and intonative contour types) will be different in dyads with autism. We extracted infants’ and mothers’ vocal productions from family home movies and analyzed the mean duration and pitch as well as the pitch contours in interactive episodes. Results show that mothers of LDA infants use relatively shorter productions as compared to mothers talking to TD infants. LDA infants’ productions are not different in duration or pitch, but they use less complex modulated productions (i.e., those with more than two melodic modulations) than do TD. Further studies should focus on developmental profiles in the first year, analyzing prosody monthly.     

Does it help to feel your body? Evidence is inconclusive that interoceptive accuracy and sensibility help cope with negative experiences

ABSTRACT

In four studies (total N?=?534), we examined the moderating impact of Interoceptive Accuracy (i.e. IAcc, as measured with the heartbeat counting task) and Interoceptive Sensibility (IS, assessed via questionnaire) on negative affect, following social exclusion or after receiving negative feedback. Results from an integrative data analysis combining the four studies confirmed that the manipulations were successful at inducing negative affect. However, no significant interaction between mood induction (control versus negative affect induction) and interoception on mood measures was observed, and this was true both for objective (i.e. IAcc) and subjective (i.e. IS) measures of interoception. Hence, previous conclusions on the moderating impact of interoception in the relationship between mood induction and self-reported mood were neither replicated nor generalised to this larger sample. We discuss these findings in light of theories of emotion regulation as well as recent concerns raised about the validity of the heartbeat counting task.     

LE DÉVELOPPEMENT DE LA CONSERVATION DES LONGUEURS DE DEUX HORIZONTALES DÉCALÉES

Trois groupes d'enfants (102 Canadiens français urbains, 110 Rwandais ruraux scolarisés, 74 Rwandais ruraux non scolarisés) subissent une épreuve de conservation des longueurs de deux tiges dont l'égalité est d'abord constatée par coïncidence des extrémités et dont l'une (la plus rapprochée de S, ou la plus rapprochée de E) ou les deux sont ensuite déplacées. L'analyse des résultats montre que: a) les plus jeunes enfants de chacun des groupes sont fortement inclinés à estimer plus longue la tige réellement déplacée (ou jugée déplacée) et/ou la tige la plus rapprochée de S; b) la conservation est acquise par les enfants de chacun des groupes, mais dans l'ordre chronologique suivant: Canadiens français, Rwandais scolarisés, Rwandais non scolarisés; c) dans chacun des groupes, les jugements de conservation s'appuient principalement sur l'identité et les jugements de non-conservation sur le déplacement et/ou le dépassement de l'une des tiges. Ces résultats suggèrent que la thèse de Piaget voulant que l'enfant passe d'une conception topologique ordinale à une conception euclidienne dans l'acquisition de la conservation des longueurs peut s'appliquer à des milieux différents malgré de larges différences d'urbanisation et de scolarisation.     

APPRENTISSAGE DE LA CONSERVATION DES QUANTITÉS LIQUIDES CHEZ DES ENFANTS RWANDAIS ET CANADIENS-FRANCAIS1

Three groups of 16 subjects (rural school Rwandese, rural unschooled Rwandese and urban school French-Canadian children), classified as preoperational on a pretest including eight tests of conservation, were trained on the conservation of liquid quantities by a method based on anticipation of levels and compensation of dimensions. It was found that a) the performance of all three groups, when compared with controls, was significantly higher on two successive post-tests (two months interval); b) the three groups did not differ from one another either in global scores on both post-tests or in number of training sessions required for learning; c) the types of justification were based predominantly on perceptual features and on identity in non-conservation and conservation judgments, respectively. Results are discussed mainly in terms of the kind of justifications given by the three groups, the relative effectiveness of the two types of training given, and the genuineness of the conservation induced.     

Response production during extinction training is not sufficient for extinction of evaluative conditioning

Two high-powered experiments examined the role of evaluative response production in the extinction of evaluative conditioning (EC) by positioning EC in the procedural and conceptual framework of classical conditioning (CC). According to Rescorla's response inhibition hypothesis, more frequent responding during extinction training results in larger extinction during testing. Experiment 1 used three extinction conditions following response acquisition in an EC procedure: evaluative responses were measured only after extinction; after acquisition and after extinction; or were continuously measured after acquisition, during extinction and after extinction. Based on Rescorla's response inhibition hypothesis, we predicted that extinction of EC would be the highest in the third condition. Experiment 2 was aimed at further facilitating extinction of EC by encouraging participants to experience that their evaluation may change over the course of the experiment. To this end, half of the participants completed pre- and post-acquisition ratings prior to practicing continuous response expression in the extinction phase. Contrary to our predictions, no extinction of EC was observed in either of these experiments. We conclude that Rescorla's inhibition response hypothesis may not apply to EC and discuss the theoretical implications of this finding.     

Joint roles of parenting and nutritional status for child development: Evidence from rural Cambodia

Substantial work has demonstrated that early nutrition and home environments, including the degree to which children receive cognitive stimulation and emotional support from parents, play a profound role in influencing early childhood development. Yet, less work has documented the joint influences of parenting and nutritional status on child development among children in the preschool years living in low‐income countries. Using panel data from 2016 to 2017 on the parenting, nutritional status, and early developmental outcomes (executive function, language, early numeracy, and socioemotional problems) of 6,508 Cambodian children ages 3–5 years, our findings demonstrate that inequities in early development associated with family wealth are evident at age 3 and increase among children ages 4 and 5 years. Using hierarchical regression analysis, a significant share of these inequalities is explained by differences in parenting and early nutritional status, measured by stunting. Better‐educated parents engage in more stimulating and supportive parenting practices. However, the positive association between parenting and language and early numeracy outcomes is 35–54% stronger for non‐stunted children, and parental activities explain only about 8–14% of the cognitive gap between the lowest and highest wealth quintiles. The results highlight the need for additional research outlining interactions between environmental factors that link family wealth and child development.     

Investigations of hemispheric specialization of self-voice recognition

Three experiments investigated functional asymmetries related to self-recognition in the domain of voices. In Experiment 1, participants were asked to identify one of three presented voices (self, familiar or unknown) by responding with either the right or the left-hand. In Experiment 2, participants were presented with auditory morphs between the self-voice and a familiar voice and were asked to perform a forced-choice decision on speaker identity with either the left or the right-hand. In Experiment 3, participants were presented with continua of auditory morphs between self- or a familiar voice and a famous voice, and were asked to stop the presentation either when the voice became "more famous" or "more familiar/self". While these experiments did not reveal an overall hand difference for self-recognition, the last study, with improved design and controls, suggested a right-hemisphere advantage for self-compared to other-voice recognition, similar to that observed in the visual domain for self-faces.