The relationship between visual stimulus intensity and directional finger movements was examined in infants of two age groups (16 infants, 10 to 15 weeks old, and 8 infants, 20 to 25 weeks old). Two hypotheses derived from Schneirla's Approach-Withdrawal Theory were examined: (1) that responses of the younger, but not of the older infants, would…

Two-year-olds' reactions to strangers were related to ratings of their emotionality, sociability and activity and to ratings of parental love and control by both fathers and mothers. Each child received two sessions with strangers, one male and one female. Four times per session a stranger, in a friendly manner, approached each child as it sat in…

This paper deals with research on the development of infants' ability to perceive invariant features of things and the relation of objects to both the spatial layout of the infants' environment and to themselves. Basic assumptions regarding the perception of invariance are discussed and a theoretical view of the role of motion in the development…

This study investigated the possibility of a functional relation between the auditory and visual systems in the human newborn beyond reflexive organization. Visual activity was monitored in 16 newborns through the use of infrared corneal reflection video tape recording. Infants were observed in total darkness and while monocularly viewing a…

This paper presents an overview of the literature on mother-infant attachment behavior. Attachment is defined by Ainsworth as involving affection, discrimination, observable behavior, active participation by both parties, and reciprocal response. The process of attachment is seen by Stone, Smith, and Murphy as taking place in three stages over the…

The impact of two levels of infant organization and marital satisfaction on parent-infant interaction patterns was investigated in 25 couples. It was predicted that (1) disorganized infants would have a negative impact on the parent-infant relationship, and that (2) parent-infant interaction with disorganized infants would be more negative among…

The influence of age, sex, representational detail of objects (prototypicality) and adult play suggestions on children's progression of pretend behaviors was studied. A checklist was developed and utilized for coding the responses of 20 children (10 males, 10 females), to objects judged to be high and low prototypical by 12 adults. Children ranged…

The ability of 5-month-old infants to recognize two-dimensional (pictorial) representations of three-dimensional objects was investigated. Subjects were 24 5-month-old infants. The novelty preference technique was employed: all infants were familiarized with a three-dimensional object--a doll. Following familiarization, three novelty tests were…

This study compares interactions between infants and parents to interactions between infants and strangers. Infants from 2 weeks to 6 months of age were taped in face-to-face interactions with unfamiliar male and female adults. Tapes of parent-infant interactions were available from a prior study. Specific infant and adult behaviors were coded and…

The purpose of this study was to investigate whether or not infants who had experienced different types of naturally-occurring, significant separations from an attachment figure during the first year of life differed in their response to separation at 12 months of age. Thirty-three 12-month-old Caucasian infants from middle class, intact families…

Based on findings that report differences between cries of normal and clinically abnormal infants, this study examined the relationship between birthweight and behavioral and acoustic features of neonatal cry because of the long-standing association between birthweight, perinatal trauma, and subsequent development. Subjects were 88 neonates…

This study explored the relationship between the mother-infant interaction and the concurrent perceptual-cognitive and intellectual status of the infant. One hundred and eight-nine 12-week-old infants were given a battery of perceptual-cognitive tasks, including the Mental Developmental Index (MDI) of the Bayley Scales, the Corman-Escalona Scales…

The purpose of this paper was to examine whether a pediatrician in well child care could promote mother-child interaction in the infant's first 6 months of life, and whether this intervention could affect the infant's cognitive development. Thirty-two mothers and their healthy, first born infants were followed by one pediatrician at 2, 4, 8, 15…

This study investigated at the age at which infants become able to discriminate between their mothers and females strangers, as measured by differential patterns of pauses during the infants' crying while being spoken to by their mothers and female strangers. The subjects, 14 infants ranging in age from 7 to 20 days, were fed, burped, and changed,…

This study examines serial habituation in a sample of 54 infants aged 2, 3, and 4 months to determine whether age changes are partially a function of different "strategies" rather than simply different rates of habituation. The serial habituation hypothesis proposes that attention and habituation of attention proceed in order of the relative…