Multiple discriminant function analysis was conducted with data from Strange Situations. Results enable researchers to obtain attachment classifications directly from scores on interactive behavior and crying during reunion episodes. (PCB)

The influence of maternal stimulation on infant exploratory behavior was examined in both a cross-sectional/ correlational study and an experimental study, in order to overcome the limitations on making causal claims that attend most research into maternal influence on infant development. (Author/DB)

A study of the relationship between pain-relieving drugs given to mothers during labor and delivery and neonatal behavior as assessed by the Brazelton Scales. Tested 44 infants on eight different days during their first month of life. (SDH)

The relation between maternal presence and infant's vocalization depended upon the infant's state: when the infant was in the active awake state, he vocalized less in the presence of the mother than when alone, thus indicating that the majority of early vocalizations are associated with a non-social situation. (Authors/RY)

Suggests that dominance can be defined as asymmetry in predictability in social variables of importance, and bidirectionality as symmetrical predictability. Procedures which address the concepts of cyclicity within a person and synchronicity between people and which assess asymmetry and symmetry in social interaction are discussed. (Author/RH)

A previous study of undergraduates' sibling deidentification (global judgments of being different from one's sibling) was cross-validated on a new population, mothers judging pairs of their own children; at a new age level, varying in age from 1 month to 18 years; and using same-opposite as well as alike-different judgments. (Author/JMB)

Examines reciprocity in caregiver-child interactions by assessing 24 infants and their mothers with regard to temperament and maternal behavior, respectively. Results suggested that the more difficult the child temperamentally, the less the maternal responsiveness. (JMB)

A contextual history of the early word use of 2 children during the first year of language was compiled from 28 hours of videotaped mother-child interaction. (Author/JMB)

Findings from studies exploring role of joint attentional focus in children's acquisition of language indicated that language of 24 mothers and their 15- to 21-month-olds inside episodes of joint attentional focus involved more utterances, shorter sentences, more comments, and longer conversations than outside of episodes. Also, object references…

Findings argue for an increased emphasis on temperament research in the first postpartum months, for the development of more age-appropriate assessments, for the simultaneous use of multiple measures in such research, and for the continued inclusion of mothers as credible observers of infant behavior. (Author/RH)

Factors influencing the psychological impact of menarche include age at time of first period, social factors, amount of preparation, and cultural factors. (Author/MP)

Reports an investigation of divisions of labor in child care within the home and the relationship between these divisions and the masculinity, femininity, and androgyny of mothers and fathers. (JMB)

Mothers of firstborn infants were videotaped playing with a six-month-old infant with sex-appropriate or cross-sex clothes and names. Toy choice and interaction styles varied with the perceived sex of the child. (BD)