Investigates the use of the Bayley Infant Behavior Record (IBR) with premature and full-term infants. Analysis of the two discriminant functions obtained from the discriminant analysis appear to substantiate the claim that the IBR is an index of cognitive test-taking behaviors, which can be used reliably with preterm and full-term infants.…

Seven-month-old infants looked at pairs of slides of two and three objects while listening to either two or three drum beats. Study data call into question the suggestion that the influence of auditory information on infants' attentiveness to a visually presented numerical event is mediated by cross-modal matching of numerical information.…

Infants 6 1/2 months of age were first trained to discriminate a very salient speech contrast and subsequently were tested for their recognition of the contrast when it was embedded within redundant or mixed "context" syllables. Also assessed was the effect on recognition of positioning the target syllable differently within a…

Mothers of 48 infants approximately 12 months old displayed either positive or neutral affect while their infants responded to pleasant, ambiguous, or aversive toys. On the first trial maternal affect had no effect; on the second trial, positive maternal affect resulted in more positive infant responses, but only for the ambiguous toy. (Author/RH)

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)

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)