Evolutionary developmental psychology is a discipline that has the potential to integrate conceptual approaches to the study of behavioral development derived from psychology and biology as well as empirical data from humans and animals. Comparative research with animals, and especially with nonhuman primates, can provide evidence of adaptation in…

This study shows that 12-month-old infants direct more distal/affiliative behaviors to their fathers and show no preference between parents in proximal/attachment behaviors. However, with a stranger present, more proximal/attachment behaviors are directed toward the mother with no preference shown in distal/affiliative behaviors. (JMB)

The facial expressions of twenty-eight 13-month-old middle-class children were videotaped during the 3-minute separation episode of the Ainsworth strange-situation procedure. Anger was the dominant negative emotion expressed by the majority of children; patterns of emotion expression varied with type of attachment; and the proportion of time anger…

Reports two studies conducted at an infants' residential center. Study 1 assesses whether infants already attached to a favorite nurse could transfer allegiance to an adoptive mother within a two-week adaptation period and evaluates growing attachment to the new mother; Study 2 explores infant fear of a strange infant, and infant attachment to a…

No main effect relations between infant proneness-to-distress temperament at 9 months and attachment classification at 13 months were found. Proneness-to-distress temperament was associated with maternal behavior and personality. (PCB)

In a longitudinal study of 29 middle-class Japanese infants, an attempt was made to identify early temperamental dispositions that predict later attachment classification. Specifically, Ainsworth Strange Situation observations at 12 months of age were preceded by, among others, observation of distress evident in newborns when a nipple was removed;…

The stability of eight attachment behaviors was investigated in two samples of infants. One sample observed at 10 and 14 months of age, the other sample at 14 and 18 months. For each testing period, the infants were observed during two sessions: (a) in the presence of the mother; and (b) before, during, and after a brief separation experience.…

This paper reviews a few studies, both in animals and humans, that are relevant in helping us to understand factors affecting infant-mother interaction. (MM)

Findings suggest that infant temperament affects the manner in which security or insecurity is expressed, but does not determine whether an infant develops a secure or insecure attachment to parent. (PCB)

Discusses the relationship between insecurity and attachment to soft, inanimate objects. Because attachments to nonsocial objects are common, there is agreement that they do not presage maladjustment. An investigation with 20- to 41-month-olds indicated that attachment to blankets was not associated with general fearfulness, however, certain…

Two studies were conducted to (1) develop measure of infants' executive capacity, defined as difference between infants' most sophisticated level of functioning displayed first in free and then in elicited play and (2) to test several hypotheses regarding relationship between these performance and competence measures of child functioning and home…

Under equivalent task conditions, assessed object and person concept attainment in securely and insecurely attached infants. Subjects were 16 male and 23 female infants from middle class families. (Author/RH)

Measures of positive and negative affect and affect ability; of look, approach, and proximity behavior; and of overall response pattern were obtained from 66 infants of 12 months. These measures and other results suggested that both parents are significant sources of emotional guidance for infants in conditions of uncertainty. (RH)

Examined role of mother-toddler attachment in moderating the relationships between behavioral inhibition and changes in salivary cortisol levels in response to novel events. Subjects were 77 infants 18 months old. Found elevations in cortisol only for inhibited toddlers in insecure attachment relationships. Mothers in these relationships appeared…