To document movement patterns and to examine developmental interrelationships, the ontogeny of rooting, lip, lateral tongue, mouth opening, biting, and Babkin reflexes and the development of emerging chewing behaviors were observed in two normal infants over a period from 1 week to 35 weeks of age. (Author/RH)

Sequences of mastery behavior were analyzed in a sample of 67 infants 6 to 12 months old. Authors computed (a) frequencies of six categories of mastery behavior, transitional probabilities, and z scores for each behavior change, and (b) transitions from a mastery behavior to positive affect. Changes in frequencies and similarity in organization…

Although recent research suggests that drug misuse involves multiple etiologies, more information is needed to aid in the development of individualized treatment regimens. Individuals with high sensation-seeking (SS) needs do not appear to respond well to traditional counseling approaches. Adolescents (N=584) aged 15 or 18 at time 1 (T1) and 18 or…

Adopts a longitudinal design to track mother-child developmental change in infant task-related mastery and concomitant maternal behavior. Finds that, as infants gain more mastery across time, mothers gradually withdraw support in terms of concrete, specific and nonverbal means of instruction. Results support a one-step-ahead model for maternal…

Using a longitudinal design, investigates the interactive behaviors of mothers of normal infants and mothers of infants who are known to differ on a host of cognitive, behavioral, and biological parameters. Examines the developmental course of emotional expressivity in these infants. (HOD)

Reports on a longitudinal study that provides a prospective view of children's personality functioning prior to their subsequent experiencing of divorce. Shows the behavior of boys as early as 11 years prior to parental separation or formal dissolution of marriage to be consistently affected by predivorce familial stress. (HOD)