Notes two faulty aspects of the Reznick et al., twin study (PS 526 688): the expressive language measure at 14 months, which has practically no spread of item difficulty, as well as measures included to assess specific cognitive characteristics; and the notion of infant transition as it affects interpretation of the results. (HTH)

Studied the ontogeny of walking by prelocomotor infants. Results support a dynamic systems view of development and the view that upright locomotion emerges from the self-organization of multiple cooperating elements rather than as a result of a preexisting neural code. (Author/GR)

Cross-sectional and longitudinal study of one- to six-year-olds in full-time child care assessed sequences and individual differences in development of social competence with peers. Study collects most extensive and varied data to date. Findings concern stability of individual differences, social classifications, influences of variations in…

Studied partner and site novelty for mother-infant, stranger-infant, and mother-stranger face-to-face interactions. Found that adult-infant vocal timing measures at age 4 months did predict attachment and cognition at age 12 months. Comparison of mother-infant and stranger-infant interactions suggested the dynamics of infants' early…