Investigated effects of older siblings on imitation by 12-, 15-, and 18-month-olds. Found that all age groups acquired one to two new behaviors per day through imitation. Older infants imitated more multi-step sequences and substituted more objects during reenactment than younger. Compared to infants without siblings, infants with siblings…

Investigated development of face-to-face communication in infants between 1 and 14 weeks old and their mothers. Found a curvilinear development of early face-to-face communication, with increases occurring between weeks 4 and 9. When placed on a sofa, infants' face-to-face communication was longer than when they were held. Girls spent a longer…

Five experiments used a categorization habituation-of-looking paradigm to investigate infants' categorization of animals and vehicles based on static versus dynamic attributes of stimuli (color images versus dynamic point-light displays). Findings showed that 6-month-olds categorize animals and vehicles based on static and dynamic information, and…

Investigated attachment security and behavior in 34 physically disabled infants and 26 non-disabled infants using convergent, categorical, and continuous (Attachment Behavior Q-Set) measures of relationship, based on the same set of home observations. Proportions of attachment classifications were identical for each group, but insecure disabled…

Studied the early development of exploratory behavior in 99 infants of 2-5 months. Results show that there are significant changes in spontaneous multimodal exploration of a novel object between 2 and 5 months. (RJC)

Forty British parents of two-year-olds were asked about gender-related adult roles, beliefs about gender differences in children's behavior, and whether they perceived their own child in terms of gender-specific behavior. The majority of children were perceived as conforming to gender stereotypes. (Author/BJV)

Sixty-four mother-infant pairs were videotaped during structured episodes in which the mother challenged the infant to use her instrumentally to get access to or to operate a toy. At age 6 months the infants could use their mothers instrumentally in 36% of the episodes, increasing to 67% at 9 months and 78% at 13 months. (MDM)

This study compared efforts of 20 deaf and 20 hearing infants to reengage their deaf or hearing mothers in a maternal "still-face" situation. When all kinds of infant signal behaviors were considered, few overall differences were found in eliciting efforts by deaf and hearing infants. (Author/DB)

Parents with colicky and noncolicky infants answered questions about infant behavior expectations. Parents with colicky infants described infant behavior and expectations for infants at 3 months more negatively; there were no significant group differences for infants at the 8- to 11-month current situation. However, the amount of infant colicky…

Object play and communication development were studied with four infants with cerebral palsy, involving time spent with objects, types of object play, and object selection. As coordinated looking between object and adult emerged, children demonstrated increased interest in objects and sophistication in their play behaviors. (SW)

Examined the visual scanning patterns of infants ages 6, 10, and 13 weeks who viewed static geometric figures. Measures of fixation dwell-times, saccade lengths, and the choices and sequences of saccadic targets revealed that, although younger infants demonstrated salience-guided scanning behavior, older infants increasingly utilized volitional…

Examined the stress vulnerability of infants with disorganized/disoriented attachment patterns by measuring salivatory cortisol levels in 19-month olds following the Ainsworth Strange Situation procedure. Indicates that infants' disorganized attachment behavior reflects a vulnerability to stressful stimulation, suggesting a model of stress…

Infants at two, four, and six months of age learned a string-pulling task and were tested again two months later. Individual differences in emotional expressions of anger during extinction, and interest and enjoyment during learning, were stable over the two-month interval. (BC)

In a study of 24 preterm and 24 full-term infants at 8 months, infants who reacted to a novel stimulus with increased vagal tone showed more focused examination and exhibited greater exploratory play range than those whose vagal tone decreased with the stimulus. (LB)

Observed the behavior of 37 infants in response to their mothers' normal and still face. Infants reduced their smiling and increased their gazing away from mother during the still face condition compared to normal face condition. Compared to three month olds, six month olds were more likely to use hand activities while gazing away from mother. (MM)