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Pulling to stand: Common trajectories and individual differences in development
Author(s) -
AtunEiny Osnat,
Berger Sarah E.,
Scher Anat
Publication year - 2012
Publication title -
developmental psychobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.055
H-Index - 93
eISSN - 1098-2302
pISSN - 0012-1630
DOI - 10.1002/dev.20593
Subject(s) - psychology , cognitive psychology , developmental psychology
This longitudinal study of 27 infants examined the development of pulling‐to‐stand (PTS). In general, infants began PTS using a two‐leg strategy and transitioned to a half‐kneel strategy. As a group, infants showed no preference for either strategy at the onset of PTS, switching between strategies until half‐kneeling became the dominant pattern about 1 month after the onset of PTS. Examination of individual developmental trajectories revealed variability in age at PTS onset, time between PTS onset and half‐kneel strategy onset, duration of the two‐leg strategy as the dominant pattern, time until the half‐kneel strategy became the dominant pattern, shape of the transition between strategies (gradual vs. abrupt), and timing of PTS relative to onset of other motor milestones. We discuss variation in developmental trajectory in terms of adaptive behavior during the acquisition of new skills and as a process shaped by infants' unique experiences prior to and during the acquisition period. © 2011 Wiley Periodicals, Inc. Dev Psychobiol 54:187‐198, 2012.