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Kinematic characteristics of second-order motor planning and performance in 6- and 10-year-old children and adults: Effects of age and task constraints
Department of Psychology, Umeå University, Umeå, Sweden.
Department of Psychology, Umeå University, Umeå, Sweden.
Department of Psychology, Umeå University, Umeå, Sweden.
Department of Psychology, Umeå University, Umeå, Sweden.
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2020 (English)In: Developmental Psychology, ISSN 0012-1649, E-ISSN 1939-0599, Vol. 62, no 2, p. 250-265Article in journal (Refereed) Published
Abstract [en]

This study explored age-related differences in motor planning as expressed in arm-hand kinematics during a sequential peg moving task with varying demands on goal insertion complexity (second-order planning). The peg was a vertical cylinder with either a circular or semicircular base. The task was to transport the peg between two positions and rotate it various amounts horizontally before fitting into its final position. The amount of rotation required was either 0°, 90°, 180°, or ?90°. The reaching for the peg, the displacement of it, and the way the rotation was accomplished was analyzed. Assessments of end state comfort, goal interpretation errors, and type of grip used were also included. Participants were two groups of typically developing children, one younger (Mage = 6.7 years) and one older (Mage = 10.3 years), and one adult group (Mage = 34.9 years). The children, particularly 6-year-olds, displayed less efficient prehensile movement organization than adults. Related to less efficient motor planning, 6-year-olds, mainly, had shorter reach-to-grasp onset latencies, higher velocities, and shorter time to peak velocities, and longer grasp durations than adults. Importantly, the adults rotated the peg during transport. In contrast, the children made corrective rotations after the hand had arrived at the goal.

Place, publisher, year, edition, pages
2020. Vol. 62, no 2, p. 250-265
Keywords [en]
action prediction, children, end state comfort, kinematics, motor planning
National Category
Psychology
Identifiers
URN: urn:nbn:se:uu:diva-392905DOI: 10.1002/dev.21911ISI: 000486098900001PubMedID: 31502277OAI: oai:DiVA.org:uu-392905DiVA, id: diva2:1350133
Funder
Knut and Alice Wallenberg Foundation, 2015.0192Swedish Research Council, 2011-179Available from: 2019-09-10 Created: 2019-09-10 Last updated: 2020-04-06Bibliographically approved

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