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Infants plan prehension while pivoting
Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Social Sciences, Department of Psychology.
2019 (English)In: Developmental Psychobiology, ISSN 0012-1630, E-ISSN 1098-2302, Vol. 0, no 0Article in journal (Refereed) Published
Abstract [en]

Abstract Skilled object retrieval requires coordination of the perceptual and motor systems. Coordination is especially challenging when body position is changing and visual search is required to locate the target. In three experiments, we used a ?pivot paradigm? to induce changes in body position: Participants were passively pivoted 180° toward a target placed at varied locations to the left and right of the center of a reaching board. Experiment 1 showed that 6- to 15-month-old infants (n = 41) plan prehension so quickly that they retrieve targets mid-turn and scale their reaches to target location relative to turn direction. Experiment 2 characterized planning mid-turn reaching in 6- to 8-month-olds (n = 5) wearing a head-mounted eye tracker. Reach planning depended on when the target appeared in the field of view?not on target fixation. Experiment 3 used head-mounted eye tracking and motion tracking to assess perceptual?motor coordination in adults (n = 13). Adults displayed more mid-turn reaching than infants. But like infants, adults scaled reaching to target location relative to turn direction, and contact time depended on when the target came into view?not on target fixation. Findings show that fast, efficient perceptual?motor coordination supports flexibility in infant prehension, and constraints on coordination are similar across the lifespan.

Place, publisher, year, edition, pages
John Wiley & Sons, 2019. Vol. 0, no 0
Keywords [en]
infant, object prehension, planning, prospective control, reaching
National Category
Psychology
Identifiers
URN: urn:nbn:se:uu:diva-382885DOI: 10.1002/dev.21856OAI: oai:DiVA.org:uu-382885DiVA, id: diva2:1313687
Conference
2019/05/06
Available from: 2019-05-06 Created: 2019-05-06 Last updated: 2019-05-06

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Publisher's full texthttps://doi.org/10.1002/dev.21856

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