The purpose of the study was to establish dimensions of functioning accounting for interindividual variation in behavior in the later infancy period and to investigate the stability of the dimensional structure during the infancy period. Factor analyses were performed on parent questionnaire data for 357 infants, aged 11 to 15 months. An 8-factor…

The purpose of this study was to apply factor analysis techniques to delineate dimensions of early infant behavior and to establish categories of functioning which can be seen as a source of individuality in early childhood. Data about the behavior of 791 infants in two age groups (11-25 weeks and 26-41 weeks) were obtained using a questionnaire…

This report presents data analyzed by county and multicounty planning region which indicate that North Carolina's infant mortality rate has declined by 59 percent since 1940. (In 1940, approximately 58 infants for every 1,000 live births died in North Carolina before their first birthday.) This reduction in infant deaths is comparable to that…

The purpose of the present study was to investigate more directly the effects of content and repetition of contingent visual feedback on a discrete operant pulling response and accompanying visual attention in 24 six- to seven-month old infants. Simultaneous recording was made of infant operant behavior and visual attention. Results indicated…

This brief report summarizes a study to identify primary bound conditions of sound level selection as a first step in collecting base-line data for evaluating selective listening performance in infants with known or suspected hearing loss. Ten normal 9 to 22 month old infants in their home cribs played with an automated operant "toy" that allowed…

This experiment asked whether infants at 5 months perceived an invariant over four types of rigid motion (perspective transformations), and thereby differentiated rigid motion from deformation. Four perspective transformations of a sponge rubber object (rotation around the vertical axis, rotation around the horizontal axis, rotation in the frontal…

The data indicate that fathers do interact with their infants, and that they demonstrate charactersitic styles of interaction. (Author)

A reanalysis of first-year longitudinal data suggests that infants' reactions to a stranger up through the middle of the first year are attributed to a wariness of the unfamiliar while by 9 months, learned aversions which have their roots in prior disturbing experiences may become an important additional determinant. (Author/JMB)

Twenty infants were observed at home interacting with their mothers, fathers, and an unfamiliar investigator when they were 15, 18, 21, and 24 months of age. (Author/JMB)

Reports research into the visual fixation of 3- to 11-week old infants as they observed adult faces. Reports a dramatic increase in fixations occurred between 5 and 7 weeks for all conditions. (SL)

Face-to-face interaction between 26 infants and their mothers and a relatively unfamiliar figure was observed longitudinally in the home environment when the infants were between 6 and 15 weeks of age. Normative findings indicated that infants became more responsive over this time period, whereas maternal behavior did not change. (Author/JMB)

Groups of 7 1/2-month-old infants heard 1 of 8 episodes consisting of no, slight, moderate, or large discrepancy between a habituated standard and a transformed auditory stimulus. Patterns of cardiac deceleration supported the hypothesis that attentiveness is an inverted-U function of the degree of discrepancy between stimulus event and schema.…

This study constitutes the beginning of a longitudinal investigation of phonological development of four children from birth to 2 years. Little variation was found in mean fundamental frequency. Duration, within-utterance range and variability did show developmental change. (RM)

Twenty-eight 10-month-old infants were observed by two independent teams, one measuring activity in the home situation and one measuring attachment behaviors in a videotaped standard laboratory sequence. (MS)