Subjects were 72 first, third and fifth graders. Stimuli consisted of an initial set of 20 unrelated pictures, and a second set of 20 pictures which could be classified according to four superordinate categories. (MS)

Formal and familiar materials were used to test Piagetian classification and formal operational abilities in two groups of educated adults: one group aged 30-38 and the other aged 57-82 years. Subjects did not show mastery of the tasks. Results suggest a new model of cognitive lifespan development. (Author/MS)

Supported by the United States Office of Education, Small Projects Program, Grant No. 7-E-103.

This study used the "double easy-to-hard" paradigm to examine the hypothesis that the class inclusion (CI) task should be equivalent in relational complexity to the transitive inference (TI) problem. Participating in the study were 64 girls and 50 boys, with a mean age of 8 years, 6 months. Stimuli for easy versions of the tasks were…

Describes differences in the socialization setting provided by all-boy and all-girl play groups, and explores possible reasons for children's tendency to congregate in same-sex groups. Considers three classes of possible explanatory processes: biological factors, socialization pressures from adults, and gender cognitions. (RH)

Presents a study of the effects of interaction between a child and his mother or an older sibling on the child's object sorting behavior. Other factors studied included sex of sibling and family size. Subjects were 120 first grade children. (BD)

The purpose of this study was to improve the reliability of the Sigel Cognitive Style Test. Post hoc analysis of ninety test protocols had indicated that the original thirty-five card test could be shortened to improve the test's reliability. This analysis also showed that males were responding to certain cards differently from females.…

An attempt to locate, review, classify, and abstract a more extensive set of measurement instruments and tests relevant to education and care programs for children from birth to age eight was made. Publishers' catalogs, test review, journals and other measurement documents have been examined to obtain a list. After extensive examination of…

Twelve papers on the emergence and maintenance of severe clinical depression and depressive symptoms during adolescence are presented. Topics include parental influences, epidemiological data, depressive and negative affect, hormonal effects, preadolescent symptoms, sex differences, longitudinal studies with rhesus monkeys, suicidal ideation,…

This study investigates the development of multiplicative classification skills in lower class black and middle class white children on tasks which contain either three-dimensional objects or two-dimensional pictorial representations of the same objects. Multiplicative classification refers to the simultaneous classification of objects into two or…

A study was conducted to identify types of mental operations of 4- and 5-year-olds and to relate them to the child's age and the educational level of the mother. The sample consisted of 423 white English-speaking children of American parentage, evenly divided by sex and as evenly distributed as possible over the 12-month-age range of 4 to 5 years.…

Race was more salient than sex when 93 white preschool children (46 males and 47 females) in a virtually all-white community characterized photographs of others, but sex and race were equally salient in self-classification. Consistency between cognitive and affective responses increased with subjects' ages from 3.0 to 5.7 years. (SLD)

Matrix tasks designed to assess the logical properties of multiple classification and multiple seriation were administered to 105 first, third, and fifth grade children. The tasks included cross-class and double series matrices, each of which had a reproduction and a transposition instructional set, and a revised set of cross-class and double…