Compared the spontaneous leg movements of 10 infants with Down Syndrome to those of nondisabled infants matched for chronological age and motor age. Contrary to expectations, no significant difference was found in the frequency of leg movements between the two groups. However, Down Syndrome subjects demonstrated significantly fewer of the most…

Estimates the extent to which heredity influences perceptions of childhood family environment in a sample of 58 monozygotic and 46 dizygotic pairs of adult twins who were reared apart. The data confirm the importance of genetic factors in some, but not all, measures of family environment. Environmental influences were more important than genetic…

Examined in 4 experiments 3- and 4-year-olds' ability to communicate about containment and proximity relations. Found that when describing where a toy mouse was hidden, children were more likely to successfully disambiguate a small landmark when it was in, rather than next to, the large landmark. Three-year-olds initiated searches faster when the…

Compared language development of 16 firstborn and 16 secondborn children at 21 months to investigate whether secondborn children benefit from overheard conversations between caregivers and older siblings. Found that secondborn children were more advanced that firstborn in pronoun production, while not differing general language development,…

Examined memory of 3- to 18-year-olds with leukemia regarding lumbar punctures (LP). Found that children displayed considerable accuracy for event details, with accuracy increasing with age. Use of Versed (anxiolytic medication described as a "memory blocker") was not related to recall. Higher distress predicted greater exaggerations in…

Examined distractibility during visual fixations in 6- to 24-month-olds. Found that latency to turn toward a distractor was a function of length of look before distractor onset. Immediately before onset, children had greater sustained lowered heart rate for trials on which they continued looking at television monitor than for trials on which they…

Examined interrelations among behavioral inhibition (BI), cardiac activity, and attachment status in 4.5-year olds. Found that only Secure children showed predicted relationship between low BI and high heart period (HP) or respiratory sinus arrhythmia. Increases in HP from assessment during separation from mother to assessment three minutes after…

Investigated 4-, 8-, and 11-year-olds' ability to categorize intentionally false and true statements as lies and truths. Found that older children were more likely to categorize false statements as lies and true statements as truths than were 4-year-olds. Antisocial lies were rated as most serious, and "white lies" as least serious.…

Explored in three experiments children's understanding of emotion in speech. Found gradual developmental change from 4-year-olds' focus on content to adult's focus on paralanguage. Children exhibited greater response latencies to utterances with conflicting cues than to those with nonconflicting cues. They accurately labeled affective paralanguage…

Sex differences in responsiveness to infants were investigated by comparing the physiological responses of boys and girls in middle childhood and early adolescence with their overt behavioral reactions which were presumed to be more affected by societal norms. Results showed no sex differences on the psychophysiological measures but did reveal sex…

This naturalistic field study of child-rearing patterns compared observational and developmental data for 60 home-based and 60 day care center-based Swedish toddlers. (Author/JMB)

Compared with respect to their susceptibility to peer pressure to engage in deviant activity were fifth-, sixth-, eighth-, and ninth-graders from intact, single parent, and stepparent families. Youngsters living with both natural parents were less susceptible to pressure than those living in other family environments. (Author/RH)

Differences between father-absent and father-present samples were not large. Although study quality was not the best predictor of outcome, the best-quality studies produced nonsignificant estimates of effect size. Most effect-size estimates were less than .5; many were much smaller. (RH)

Study of children aged 21 to 31 months tentatively concludes: (1)behavioral tendency to be inhibited or uninhibited with unfamiliar people or during unfamiliar events is moderately stable across time and context; and (2)moderately negative relationship exists between behavioral inhibition and heart rate variability, and positive relationship…

A recognition measure of Kohlbergian moral reasoning, developed on the basis of a production measure, was psychometrically evaluated. Results showed that the Sociomoral Reflection Objective Measure has acceptable concurrent validity and high levels of test-retest reliability and internal consistency. (Author/CI)