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21.
Specialization of the motor system in infancy: from broad tuning to selectively specialized purposeful actions 下载免费PDF全文
Hana D'Souza Dorothy Cowie Annette Karmiloff‐Smith Andrew J. Bremner 《Developmental science》2017,20(4)
In executing purposeful actions, adults select sufficient and necessary limbs. But infants often move goal‐irrelevant limbs, suggesting a developmental process of motor specialization. Two experiments with 9‐ and 12‐month‐olds revealed gradual decreases in extraneous movements in non‐acting limbs during unimanual actions. In Experiment 1, 9‐month‐olds produced more extraneous movements in the non‐acting hand/arm and feet/legs than 12‐month‐olds. In Experiment 2, analysis of the spatiotemporal dynamics of infants’ movements revealed developmental declines in the spatiotemporal coupling of movements between acting and non‐acting arms. We also showed that the degree of specialization in infants’ unimanual actions is associated with individual differences in motor experience and visual attention, indicating the experience‐dependent and broad functional nature of these developmental changes. Our study provides important new insights into motor development: as in cognitive domains, motor behaviours are initially broadly tuned to their goal, becoming progressively specialized during the first year of life. 相似文献
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According to the rapid auditory processing theory, the ability to parse incoming auditory information underpins learning of oral and written language. There is wide variation in this low-level perceptual ability, which appears to follow a protracted developmental course. We studied the development of rapid auditory processing using event-related potentials (ERPs) elicited by tone pairs presented at varying inter-stimulus intervals (25, 50, 100, 200, and 400 ms) in a sample of children (N = 103) aged 7-9 years initially and again at 9-11 years. We also assessed their ability to repeat nonsense words at both time-points. The amount of difference between the ERP to single tones and paired tones (as assessed by the intra-class correlation coefficient, ICC) provided a measure of the brain's capacity to discriminate auditory information delivered at different presentation rates. Results showed that older children showed greater neural discrimination to tone pairs than younger children at rapid presentation rates, although these differences were reduced at slower presentation rates. The ICC at time 1 significantly predicted nonword repetition scores two years later, providing support for the view that rapid auditory temporal processing ability affects oral language development in typically developing children. 相似文献
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Luciana Massaro Qing Liu Elisabetta Visalberghi Dorothy Fragaszy 《Animal cognition》2012,15(6):1065-1074
Contemporary optimization models suggest that animals optimize benefits of foraging and minimize its costs. For wild bearded capuchins (Sapajus libidinosus), nut-cracking entails cost related to lifting the heavy stone and striking the nut and additional cost to transport the stone if it is not already on the anvil. To assess the role of stone mass and transport distance in capuchins’ tool selection, we carried out three field experiments. In Experiment 1, we investigated whether transport distance affected choice of a tool by positioning two stones of the same mass close and far from the anvil. Capuchins consistently selected the closer stone, effectively reducing transport costs. In Experiment 2, we examined the trade-off between the cost of transport and the effectiveness in cracking by positioning two stones of different mass close and far from the anvil. Most subjects significantly preferred the closer stone, regardless of mass, whereas others preferred the heavier stone regardless of transport distance. In Experiment 3, we changed transport distance of both stones while maintaining the same distance ratios as in Experiment 2. Capuchins maintained the preferences expressed in Experiment 2, with the exception of one subject. Overall, our findings indicate that (1) individuals vary in their sensitivity to distance of transport, (2) a few meters are perceived as a substantive cost by some monkeys, and (3) monkeys’ body mass affects their decisions. We also developed a non-dimensional Preference index (P) defined as a function of the stone mass and the transport distance to describe monkey’s choice. 相似文献
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David Messer Jennifer Kearvell-White Henrik Danielsson Dorothy Faulkner Lucy Henry Paul Ibbotson 《The British journal of developmental psychology》2022,40(3):453-470
The structure and development of executive functioning (EF) have been intensively studied in typically developing populations, with little attention given to those with Special Educational Needs (SEN). This study addresses this by comparing the EF structure of 132 adolescents (11–14 years-old) with SEN and 138 adolescents not requiring additional support (Non-SEN peers). Participants completed verbal and non-verbal assessments of key components of EF: inhibition, working memory and switching. Confirmatory Factor Analysis on each group tested one-, two- and three-factor models of EF. In both groups, there was statistical support for the fit of one- and two-factor models with no model being clearly better than the others; there was little support for three-factor models. Parsimony suggests that the one-factor model best represents the structure of EF. In light of our results, the implications for the nature of EF in early adolescence in both SEN and Non-SEN groups are discussed. 相似文献
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Espelage Dorothy L. Valido Alberto Robinson Luz E. Ingram Katherine M. El Sheikh America Woolweaver Ashley M. Koritz Laura Vincent Claudia G. Marquez Brion Walker Hill M. Svanks Rita Marmolejos Roslyn Reynoso Medina Courtney Meltsner Zeke Yalamanchi Kovida Pennefather Jordan 《Social Psychology of Education》2022,25(5):1177-1203
Social Psychology of Education - Creating effective school-wide safety mechanisms depends on understanding students' previous experiences of reporting, however, students may also be... 相似文献
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Dorothy Edgington 《Studia Logica》2014,102(4):691-707
The paper addresses a puzzle about the probabilistic evaluation of counterfactuals, raised by Ernest Adams as a problem for his own theory. I discuss Brian Skyrms’s response to the puzzle. I compare this puzzle with other puzzles about counterfactuals that have arisen more recently. And I attempt to solve the puzzle in a way that is consistent with Adams’s proposal about counterfactuals. 相似文献
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Suzanne M. Murphy Dorothy M. Faulkner Laura R. Farley 《Journal of abnormal child psychology》2014,42(2):277-289
Children with social communication disorders are known to experience more problematic peer relations than typically-developing children. However, detailed observation of their behaviour and communication during interaction with peers has not previously been undertaken. Micro-analytic observational methods were used to analyse the audio-taped interaction of children (N?=?112) selected from mainstream schools (ages 5–6 years-old) on a computerised dyadic collaborative task. Comparisons were made between children with average-to-high- and low-pragmatic language skill as measured by the Test of Pragmatic Skills. Dyads were composed of an average-to-high-skilled child plus a low-skilled child (32 dyads), or of two average-to-high-skilled children (24 dyads). Consistently with their pragmatic language scores, low-skilled children were more likely to ignore other children’s questions and requests than were average-to-high-skilled children. When average-to-high-skilled children worked with low-skilled children, as opposed to with other average-to-high-skilled children, they showed some sensitivity and adaptation to these children’s difficulties; they used significantly more directives, clarification and provided more information. However, there was a cost in terms of the emotional tone of these interactions; when working with low-skilled children, the average-to-high-skilled children expressed considerably more negative feelings towards their partners than with another average-to-high-skilled child. In conclusion, observation of the interaction of average-to-high- and low-skilled children suggests promise for peer-assisted interventions and specifies which communicative behaviours could be targeted. However, care should be taken to manage the affective climate of these interactions for the benefit of all children involved. 相似文献
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The purpose of this study was to determine whether pro-bullying attitudes are capable of mediating the low empathy–bullying relationship in the absence of a significant unmediated correlation between low empathy and bullying behavior. Using three waves of self-report data from 1371 (677 boys, 694 girls) pre-adolescent/early adolescent members of the Illinois Study of Bullying and Sexual Violence (ISBSV), the mediating effect of pro-bullying attitudes on the low empathy–bullying connection was examined. A path analysis revealed that pro-bullying attitudes successfully mediated the pathway running from low empathy to bully perpetration even though the unmediated relationship between low empathy and bullying perpetration was non-significant. A control or comparison pathway running from bully perpetration to pro-bullying attitudes to low empathy was also tested and found to be non-significant. It would appear that low empathy contributes to bullying perpetration by stimulating pro-bullying attitudes which, in turn, promote bullying perpetration. The theoretical, research, and practical implications of these results are discussed. 相似文献