Evaluated gender differences in infant and maternal emotional expressivity and regulation with 6-month-old infants and their mothers, using Tronick's face-to-face still-face model. Found that maternal affect, matching, rate of change between matching and mismatching states, and synchrony in the play preceding the still face differentially mediated…

This comprehensive paper proposing the use of evolutionary theory as a basis for studies in developmental psychology includes these specific sections: (1) Developmental Theories--a brief overview, (2) Individual Differences, (3) Culture and Inbreeding, (4) Sexual Dimorphism, (5) Critical Periods in the Development of Attachments, (6) Continuity…

The reliability and validity of three measures of infant temperament were compared in this study. The measures included the revised Carey (1978) Infant Temperament Questionnaire, a version of the Bayley (1969) Infant Behavior Record revised for completion by the parent, and a modified version of Buss and Plomin's (1975) EASI, an acronym standing…

Investigated the usefulness of Carey's Revised Infant Temperament Questionnaire in the Chinese culture and used the questionnaire to assess the temperamental characteristics of Chinese babies. While the general pattern of results resembled data from Carey's American sample, differences were found, which could be interpreted in terms of response…

Investigated relationships between mothers' perception of infants temperament at 6 months and their behavior toward their infants at 6 and 12 months of age among 40 firstborn Israeli infants. Temperamental intensity ratings were related to auditory stimulation and contingent positive vocalization for girls and to increased physical contact for…

A total of 114 infants at three age levels (11, 18, and 28 weeks) were rated by their mothers on a termperament questionnaire and subjected to a habituation procedure. Results suggest that subject loss in habituation studies may be the result of nonrandom individual difference factors and not just the result of temporary fluctuations in state.…

Early personality and environmental characteristics that predict later problematic aggression and depression in children were investigated longitudinally. A developmental psychopathology approach was taken. (This approach assumes that patterns of adaptation and maladaptation in development can best be understood when explored simultaneously and…

The purpose of this study was to investigate the alternative forms of young children's help-seeking in free play and problem-solving contexts. A total of 72 children aged 18 (N=36) and 24 (N=36) months were observed in pairs in free play and problem-solving settings, as well as in different social contexts--same-age versus mixed-age pairing. Both…

Temperament was measured at ages four and eight months on a sample of infants representing the five Holingshead social classes. A typology very similar to the New York Longitudinal Study's "easy/difficult" axis was found in both age groups. No influences of social class and gender differences on temperament were found. (CI)

Thirty-eight mothers completed questionnaires that assessed their attachment to their infant, stress level, and infant's temperament. Mothers were also observed interacting with their infant at six weeks and again at nine months. Found that stressed mothers felt less attached to their infant at six months than nonstressed mothers, and mothers of…

Irritability and activity, components of temperament, were rated for 114 fullterm and 163 preterm infants during five-second application of a cold disc on the thigh and five seconds following. For fullterm infants and preterm females, irritability increased and activity decreased across five trials. Females were more irritable during stimulation,…

Provides a foundation for future experimental research on the origins in mother-infant interaction of sex differences in the development of a separate sense of self. Suggests that sex differences in the experience of a separate sense of self begin to emerge in early infancy and that mothers engage in different types of contact with sons and…

Examined relationship of maternal sensitivity and infant temperament to attachment security among Korean 1-year-olds. Found that securely attached infants showed more secure-base behaviors and compliance, enjoyed physical contact, and showed fewer fussy/difficult behaviors than did other infants. Infant gender, but not security status, related to…

The authors discuss several studies which invalidate the common presumption that fathers play an insignificant role in the sociopersonality development of their infant children. It is shown that fathers are extremely salient individuals in the lives of their children, particularly their sons. (Author)