When not socially engaged, children showed a significantly greater percentage of reoriented attention during vocalizing than nonvocalizing periods. Findings confirm the existence of an attention/vocalization relation and are consonant with Greenfield's predictions about the nature of this relation. The relation held equally for prelinguistic and…

Results of two experiments indicate that dimensions of the social situation in which social behaviors are modeled influence eight-month-old children's tendency to imitate and their choice of recipients for their imitation. (Author/RH)

Three groups of macaque mother/infant dyads were observed while each lived in ecological settings that differed in level of foraging demand and, hence, the amount of work each mother was required to perform to obtain her daily rations. Findings suggest that in monkeys, as in humans, when mothers are psychologically unavailable to their infants,…

Data is from a short-term longitudinal study conducted at the Institute of Human Development which involved presenting two weeks of a special contingency experience to infants between their eighth and tenth weeks. (Authors/MB)

Caretaker-infant interaction within the first year of life was studied in a group of 10 Wolof infants. The pattern of caretaker-infant interaction was more strongly related to age of infant than any other variable investigated. The often-found result that African infants show precocious development within the first year was confirmed for the…

A series of investigations were conducted to determine whether reflexive crying occurs in newborns and to define the parameters that control his behavior. (NH)

Results of this study indicate that learning occurred only under immediate reinforcement and that there was no developmental trend in the ability to withstand the detrimental effects of delayed reinforcement. (WY)

Paper is based on a dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy from Case Western Reserve University. (WY)

Attempts to determine whether the stimulus dimension to which infants respond is different in fixed-trial and infant-control methodologies. Infants 10 weeks of age were shown four facelike patterns differing along two dimensions: number of elements and extent to which elements were organized to resemble the human face. (Author/RH)

Examines questions concerning (1) individual consistency in habituation rate to different visual stimuli and (2) individual consistency in habituation rate and exploratory activity. Twenty-four infants 4 months of age were habituated to four stimuli in two sessions, then observed in free exploration. Methodological aspects of habituation and an…

Examines (1) whether and when the development of preterm children of very low birth weight would begin to approximate that of demographically matched full-term children, and (2) whether test scores corrected for degree of prematurity or those based on chronological age would be the more accurate predictors of subsequent development. (RH)

Investigates the degree to which object familiarity and motivational factors influence infants' search behavior in an object-permanence test. (Author/MP)