Attempts to clarify the meaning of differentiation in the Piagetian concept of object permanence. (BD)

The relationship between visual stimulus intensity and finger movements was examined in infants ranging in age from 10 to 15 weeks and from 20 to 25 weeks. Infants were shown a cone that varied in size, brightness, and distance from them. (Author/JMB)

This study tested the hypothesis that one year old infants' wary behavior toward an unfamiliar female adult would decrease and affiliative behavior would significantly increase in the course of a relatively brief period. (Author/SB)

Experimental social histories were created for 22 6-month-old infants by providing structured interactions with three different adults (a distal interactor, a proximal interactor, and a neutral interactor) over a three-week period. Infants' social preferences (looking and approaching) for each of the interactors were then compared. (Author/JMB)

A factor analysis was performed on the behavioral items of the Brazelton Neonatal Assessment Scale for an urban population of 328 newborns. (Author/JMB)

Investigated in three studies were responses of 18- and 24-month-old children to a series of commands. Results suggest that a potent incentive for obeying commands lies in the pleasure very young children take in fitting their actions to the words of others. This pleasure sustains subsequent reenactment of the actions without commands. (Author/RH)

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.…

When 96 mothers and 46 fathers of 6- or 13-month-old infants independently generated behavioral cues they believed contributed to their perception of their infant's recent easiness/difficultness, few systematic differences were found between easy and difficult infants, 6- and 13-month-olds, males and females, and firstborn and later-born.…

Fifty-three infants were observed at 6 and 12 months during two 24-minute play sessions and administered Bayley Scales of Infant development at 6 and 12 months and McCarthy Scales of Children's Abilities at 30 months. Findings indicated that infant behaviors predicting competence change with age; mastery behavior appears to predict development…

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)

Studies four groups of infants with iron deficiency but without anemia in an attempt to discover behavioral signs that can be used to index high-risk probability for iron deficiency. Solemnity in well-attached infants is suggested as a clinical sign to indicate the need for biochemical screening for iron deficiency. (AS)

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)

Four groups of 18 adult listeners rated the tape-recorded cries of low- and high-risk infants on four Likert-type scale items. Results indicate that within-group methods of cry presentation accentuate the perceptual distance among cry types and may actually create many reliable differences that would not be found in between-group comparisons.…