Abstract:
:The aim of this study was to investigate the interaction of skill performance, motor overflow, and hand linkage in the form of mirror movements in a visual-manual tracking paradigm across practice trials. We hypothesized that both the amount of motor overflow and the degree of hand linkage would be linked in an inverse way to the quality of task performance. Furthermore, we expected a short-term decrease in both of these factors as children practiced and improved their task performance. Sixteen right-handed, 6-year-old children tracked a visual target with their right hand by pinching two parallel steel bars instrumented with strain gauges. The left hand was also positioned by similar instrumented steel bars to measure overflow/mirroring. At both the beginning and end of practice trials, a cluster analysis was used to determine relationships among performance, overflow, and hand linkage variables. In general, the results support the main hypothesis that the amount of motor overflow and the degree of hand linkage are linked to the quality of task performance, but the relationships between these variables across short-term learning are nonlinear.
journal_name
Dev Psychobioljournal_title
Developmental psychobiologyauthors
Lazarus JA,Whitall Jsubject
Has Abstractpub_date
1999-11-01 00:00:00pages
178-87issue
3eissn
0012-1630issn
1098-2302pii
10.1002/(SICI)1098-2302(199911)35:3<178::AID-DEV2>journal_volume
35pub_type
杂志文章abstract:BACKGROUND:This study tested the hypothesis that maternal physiological and psychological variables during pregnancy discriminate between theoretically informed infant stress reactivity profiles. METHODS:The sample comprised 254 women and their infants. Maternal mood, salivary cortisol, respiratory sinus arrhythmia (R...
journal_title:Developmental psychobiology
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journal_title:Developmental psychobiology
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journal_title:Developmental psychobiology
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journal_title:Developmental psychobiology
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journal_title:Developmental psychobiology
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journal_title:Developmental psychobiology
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journal_title:Developmental psychobiology
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journal_title:Developmental psychobiology
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journal_title:Developmental psychobiology
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