Preference for novelty, as measured with an exploratory behavior paradigm, was compared in 8-month-old full-term and preterm infants of matched conceptional age. Subjects were 64 infants, 32 full term and 32 preterm, with 16 males and 16 females in each group. (Author/JH)

Two parental questionnaires were developed for measurement of temperament in one- and two-year old children in Sweden. (MP)

Deals with sex differences in three types of nonelicited newborn behaviors, easily observable with the unaided eye: (1) states, (2) activity levels, and (3) several discrete behaviors such as spontaneous behavior and specific motor patterns. Subjects were 289 male and 272 female Black infants. (MP)

This study examined the relationship between smile type (basic, Duchenne, duplay) and play type (object, physical, vocal, book reading) during parent-infant videotaped interactions at home. Loglinear analyses revealed that different types of smiles occurred during different types of play more often than expected if distributed equally. Different…

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…

Reports an analyses of ratings on Bayley's Infant Behavior Record and test scores from the Bayley Mental Scale for 60 female and 50 male infants at 6, 12, 18 and 24 months of age. Results are discussed in terms of rank-order correlations, behavioral composite scores and study implications. (Author/SDH)

Irritability levels and activity reactivity to aversive tactile stimuli were compared for 144 full-term neonates and 191 preterm infants. Irritability ratings increased across the five trials both during and post stimulation for full-term females and males and for preterm females, but not for preterm males. Activity ratings decreased across trials…

Discusses the realtionship between toddler behavior and quality child care, and compares the care given to 18-month-old children in home care and center care situations. (CM)

As part of a longitudinal study of postpartum adjustment and infant development, this study examined whether securely attached 12-month-old infants show greater object mastery motivation and social-object mastery motivation than do insecurely attached infants. Object mastery relates to infants' goal-directed behavior that is oriented toward…

This study investigates the effects of age and prior experience with age-mates on attachment behavior and exploratory play with another child. Twenty home-reared children, half between 18 and 24 months and half between 24 and 30 months, and 20 day care children, also equally divided into the two age groups, were observed in the Ainsworth strange…

A research study was conducted to: (1) compare mother and father interactions with their newborn infant; (2) examine the effects of maternal drugs on mother-father infant interaction; (3) explore the impact of variations in length of labor on parent interaction; and (4) examine sex of parent and sex of newborn interactions to determine the nature…

This paper presents a study of the effects of "typical" infant day care on children's behavior and development. The variables studied include center versus home programs, length of time in day care, age of child and sex of child. Subjects for the study were 114 boys and girls (ranging in age from 12 to 36 months) enrolled in either a day…