Document Detail

Anticipatory reaching of seven- to eleven-month-old infants in occlusion situations.
MedLine Citation:
PMID:  21036402     Owner:  NLM     Status:  In-Data-Review    
The present study examined 7- to 11-month-old infants' anticipatory and reactive reaching for temporarily occluded objects. Infants were presented with laterally approaching objects that moved at different velocities (10, 20, and 40cm/s) in different occlusion situations (no-, 20cm-, and 40cm-occlusion), resulting in occlusion durations ranging between 0 and 4s. Results show that except for object velocity and occlusion distance, occlusion duration was a critical constraint for infants' reaching behaviors. We found that the older infants reached more often, but that an increase in occlusion duration resulted in a decline in reaching frequency that was similar across age groups. Anticipatory reaching declined with increasing occlusion duration, but the adverse effects for longer occlusion durations diminished with age. It is concluded that with increasing age infants are able to retain and use information to guide reaching movements over longer periods of non-visibility, providing support for the graded representation hypothesis (Jonsson & von Hofsten, 2003) and the two-visual systems model (Milner & Goodale, 1995).
Margot van Wermeskerken; John van der Kamp; Arenda F Te Velde; Ana V Valero-Garcia; Marco J M Hoozemans; Geert J P Savelsbergh
Publication Detail:
Type:  Journal Article     Date:  2010-10-30
Journal Detail:
Title:  Infant behavior & development     Volume:  34     ISSN:  1934-8800     ISO Abbreviation:  Infant Behav Dev     Publication Date:  2011 Feb 
Date Detail:
Created Date:  2011-02-01     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7806016     Medline TA:  Infant Behav Dev     Country:  United States    
Other Details:
Languages:  eng     Pagination:  45-54     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier Inc. All rights reserved.
Research Institute MOVE, Faculty of Human Movement Sciences, VU University Amsterdam, Van der Boechorststraat 9, 1081 BT Amsterdam, The Netherlands.
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