Direct touches to clear barriers: developmental sensitivity of a new measure of the production of ineffective responses in infancy.
CHILD NEUROPSYCHOLOGY(2012)
Abstract
Current interpretation of the object retrieval task (Diamond, 1990) as an infant assessment of response inhibition requires evidence that younger infants make more ineffective attempts to retrieve toys through clear barriers. On two 30-second trials, infants (9 or 11 months of age) saw an inaccessible toy in the front or back of a clear box. The location of the infants touches corresponded with the toy's location and, on the second trial, the younger infants touched the box more. In previous research nonhuman primates with orbital-frontal, but not dorsa-lateral, lesions also made ineffective barrier touches. The current developmental decreases in barrier touches may selectively tap developmental increases in inhibitory control supported by the developing orbital-frontal cortex.
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Key words
Infant,Executive functioning,Response inhibition,Orbital-frontal,Barrier
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