Results of a study indicated that, as age increased from seven to 20 years, reaction time decreased, with males having a more rapid reaction time than females. Beginning at age 10 or 11, subjects developed better motor plans and relied less on rapid reaction time to achieve good anticipation time. (FG)

Used a multivariate approach and longitudinal design to examine the relationship of early perceptual and cognitive development in first grade, to school achievement in fourth grade. Results indicated variables used to predict achievement differed between the sexes, and sex as a predictor variable depended upon area of achievement studying.…

A total of 259 children between 5 and 12 years of age plotted the location and heading of an adult who was standing in their classroom onto a map of the classroom. Older children performed better than younger ones; boys performed better than girls. (MDM)

Spatial cognition entails the ability to mentally represent spatial relations and to anticipate the course and outcome of transformations applied to those relations. The developmental histories of four tasks used to assess the maturity of spatial cognition in children are described. Significant effects were found for age, gender, task, and for…

Investigated 7-year-olds', 9-year-olds', and adults' ability to classify children's and adults' faces by sex using only biological based internal facial structure. Found that participants categorized adult faces by sex at accuracy levels varying from just above chance (7-year-olds) to nearly perfect (adults). All groups were less accurate for…

A preliminary experiment was conducted to explore the effects of illiteracy on hemispheric specialization. Groups of literate and illiterate Iranian children were tested on three dichotic tapes consisting of monosyllabic animal names, double-digit numbers, and nonverbal environmental sounds. All children were also tested for handedness and for…

Reports the results of cognitive test performance and early childhood activities in individuals with congenital adrenal hyperplasia, an autosomal recessive disorder associated with elevated prenatal adrenal androgen levels, demonstrating the effects of early exposure to excess androgenizing hormones on sexually dimorphic cognitive functioning.…

This study investigated the development of children's perceptions of clothing, particularly as a form of nonverbal communication. Sixteen boys and sixteen girls at five grade levels (kindergarten, second, fourth, sixth and eighth grades) were interviewed individually. A series of six questions was asked to determine whether the children used…

This paper presents two studies of the development of social competencies in infancy. In the first experiment, the central issue investigated was whether facial configuration or height is utilized by infants to respond differentially to children and adults. Five different strangers, a male and a female child, a male and a female adult, and a small…

The third Fenno-Hungarian Conference on Developmental Psychology covered four main concepts: the historical roots and development of social competence through three generations, parent-child interaction, parenthood, and the development of socio-cognitive competence through childhood and adolescence. A series of papers was presented addressing the…