Evidence of motor planning in infant reaching behavior

Laura J. Claxton, Rachel Keen, Michael E. McCarty

Research output: Contribution to journalArticlepeer-review

122 Scopus citations

Abstract

When adults reach for an object, kinematic measures of their approach movement are affected by what they intend to do after grasping it. We examined whether such future intended actions would be reflected in the approach-to-grasp phase of infant reaching. Twenty-one 10-month-old infants were encouraged to either throw a ball into a tub or fit it down a tube. Kinematic measures of the approach phase of the reach toward the ball were obtained using a motion analysis system. Infants, like adults, reached for the ball faster if they were going to subsequently throw it as opposed to using it in the precision action. The perceptual aspects of the ball were the same and cannot account for these kinematic differences. Infants appear to be planning both segments of their actions in advance. Our findings provide evidence for a level of sophistication in infant motor planning not reported before.

Original languageEnglish
Pages (from-to)354-356
Number of pages3
JournalPsychological Science
Volume14
Issue number4
DOIs
StatePublished - Jul 2003

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