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Anticipatory adjustments to being picked up in infancy
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SYSNO ASEP 0397016 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Anticipatory adjustments to being picked up in infancy Author(s) Reddy, V. (GB)
Marková, Gabriela (PSU-E)
Wallot, S. (DK)Source Title PLoS ONE. - : Public Library of Science - ISSN 1932-6203
Roč. 8, č. 6 (2013), s. 1-9Number of pages 9 s. Publication form Online - E Language eng - English Country US - United States Keywords infancy ; anticipation ; understanding intention Subject RIV AN - Psychology R&D Projects GAP407/10/2047 GA ČR - Czech Science Foundation (CSF) Institutional support PSU-E - RVO:68081740 UT WOS 000322342800010 EID SCOPUS 84879253389 DOI 10.1371/journal.pone.0065289 Annotation Anticipation of the actions of others is often used as a measure of action understanding in infancy. In contrast to studies of action understanding which set infants up as observers of actions directed elsewhere, in the present study we explored anticipatory postural adjustments made by infants to one of the most common adult actions directed to them – picking them up. We observed infant behavioural changes and recorded their postural shifts on a pressure mat in three phases: (i) a prior Chat phase, (ii) from the onset of Approach of the mother’s arms, and (iii) from the onset of Contact. In Study 1, eighteen 3-month-old infants showed systematic global postural changes during Approach and Contact, but not during Chat. There was an increase in specific adjustments of the arms (widening or raising) and legs (stiffening and extending or tucking up) during Approach and a decrease in thrashing/general movements during Contact. Shifts in postural stability were evident immediately after onset of Approach and more slowly after Contact, with no regular shifts during Chat. In Study 2 we followed ten infants at 2, 3 and 4 months of age. Anticipatory behavioural adjustments during Approach were present at all ages, but with greater differentiation from a prior Chat phase only at 3 and 4 months. Global postural shifts were also more phase differentiated in older infants. Moreover, there was significantly greater gaze to the mother’s hands during Approach at 4 months. Early anticipatory adjustments to being picked up suggest that infants’ awareness of actions directed to the self may occur earlier than of those directed elsewhere, and thus enable infants’ active participation in joint actions from early in life. Workplace Institute of Psychology Contact Štěpánka Halamová, Halamova@praha.psu.cas.cz, Tel.: 222 222 096 Year of Publishing 2014 Electronic address http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0065289
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