Vocal samples were collected from a child with cri du chat syndrome from the age of 8 to 26 months. Analyses indicated that the high vocal fundamental was characteristic of comfort state vocalizations of the child. There was a predominance of falling intonation contours and limited interutterance variation of fundamental frequency, and phonetic…

Early socialization within the family and its differential effects on the development of verbal intelligence skills were the subjects of this longitudinal study. Fifteen families with one child between one and three years old and a second child born at the beginning of the investigation took part in a longitudinal study covering a seven-year…

A longitudinal study examining the role of imitation on children's lexical acquisition is discussed here. Findings did not support the view that imitation may enable new lexical items to be acquired, and it is noted that other functions of imitation in language acquisition should be explored. (CHK)

This article reports the first findings of the Wurzburg Longitudinal Memory Study, which focuses on children's verbal memory development, particularly the acquisition of memory strategies. At the beginning of the study, 100 kindergarten children (mean age 6-and-1/2 years) were tested on various memory measures, including sort--recall, text recall,…

Coping behavior was assessed for 74 children, at 2-1/2 years of age in an experimental barrier situation and at 7-1/2 years of age a novel play situation. Analyses indicate relationships between effective coping behaviors and other measures of child development in the preschool and early school-age periods. (SDH)

Study examined speech complexity among 22 sets of parents and their school-age children during two time periods approximately one year apart. Parents and children were videotaped while completing a block design task and their conversations were transcribed. Speech patterns were found to differ at the two times. (Author/BN)

Examined the relationship between infants' early verbal imitation, when the ability to copy behaviors first emerges, and their lexical development during the second year of life. Twenty infants were examined longitudinally at ages 10, 13, 17, and 21 months. Suggests that infants' early imitation of words not in their repertoires predicts and may…

Investigated developmental change in symbolic representational ability by examining infants' imitation of vocalizations, words, visible motor actions, and nonvisible motor behaviors at ages 10, 13, 17, and 21 months. Results revealed a pattern of increasing imitation, supporting the view that a domain-independent representational capacity develops…

While previous studies investigating sex differences in the growth of academic abilities have been inconsistent in their conclusions, sex differences have often been reported, particularly in the areas of verbal and mathematical achievement. Results from several longitudinal studies have suggested that these measured differences in achievement are…

Studied across a 16-month period, young children of deaf parents showed accelerated early language development, on the average producing their first recognizable sign at 8.5 months, their tenth sign at 13.2 months, and their first sign combination at 17.0 months. Findings are inconsistent with previously reported patterns of synchrony between…

Mothers' utterances were measured during interactions with their 13-month-old infants and correlated with measures of infants' productive lexical development at 13 and 24 months. Correlations between maternal measures and infants' lexical development were lower for employed mothers than for mothers who were full-time caregivers. (BC)

Tested a normally developing child several times between 16 and 27 months of age for his ability to derive the relations between stimuli. Found that the child derived "mutual entailment" relations and showed "nonverbal exclusion" as early as 17 months. "Combinatorial entailment" relations and "verbal…

This study investigated whether mothers' responses to their infants' gestures play a role in their infants' vocabulary development. Eight infants were observed interacting at home with their mothers on 2 occasions, when the infants were 10 to 12 months old, and 16 to 18 months old. Videotapes of the observations were transcribed and coded for…

Differences in 3-month-old infants' vocal responsiveness to vocal-visual stimulation by mothers and strangers has been shown to be related to performance on both the Stanford-Binet at 3 years of age and the Illinois Test of Psycholinguistics at 5 years of age. The present retesting of 12 of the original 14 normal, first-born male subjects, now 12…

An examination of mean scores for two samples of 884 and 1570 high school students who were administered the National Merit Scholarship Qualification Test (NMSQT) in 1962 and for the entire population of 794,589 students given the same test in 1965 revealed consistent effects of birth order on mean score. Earlyborn, and firstborn in particular,…