Online reach correction in 6‐ and 11‐month‐old infants

Author:

Verhaar Erik1ORCID,Medendorp W. Pieter1,Hunnius Sabine1,Stapel Janny C.2ORCID

Affiliation:

1. Donders Institute for Brain, Cognition and Behaviour Radboud University Nijmegen The Netherlands

2. Uppsala University Uppsala Sweden

Abstract

AbstractThe current study investigated the development of online reach control. Six‐ and 11‐month‐old infants reached for a toy while their hand position was tracked. The toy either remained stationary (baseline trials) or unexpectedly displaced left‐ or rightward during the reach (perturbation trials). To obtain a measure of online reach correction, we compared reaches in the perturbation trials to reaches in baseline trials using autoregression analysis. Infants of both age groups adjusted their reach trajectories in the direction of the displacement. Moreover, we divided the reaching movements into movement units, defined as the submovements of a reach between local minima in hand speed. Eleven‐month‐old infants adjusted their reach within the span of a single movement unit; corrections in 6‐month‐olds spanned multiple movement units. These results suggest that the reach control system has a rudimentary replanning capacity by 6 months of age, which, with age, further develops to a more sophisticated online control mechanism for ongoing reaches.

Funder

Vetenskapsrådet

Publisher

Wiley

Subject

Developmental and Educational Psychology,Pediatrics, Perinatology and Child Health

Reference40 articles.

1. Visual Guidance in Infants' Reaching toward Suddenly Displaced Targets

2. Berthier N. E.(2011).The syntax of human infant reaching. In8th international conference on complex systems(pp.1477–1487).

3. Midreach Correction in 7-Month-Olds

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