Demonstrates the use of Rasch models to assess the dimensionality of an item set across cohorts in longitudinal studies. Presents data from a study on adolescents' deductive reasoning ability showing that the same test items can be measuring qualitatively different latent traits in different subsamples or at different time points. (JPB)

Age-related changes in mental flexibility, in the form of task switching, were assessed in 292 children (58-156 months old). Task switching was examined with a new task for young children, the Switch Task for Children (STC). The STC consists of two easy, comparable games and does not require reading skills, which makes it suitable for children…

Whether "psychometric" and "Piagetian" kinds of intelligence are similar is a question of whether they have similar courses of development with age. When using factor analysis to address this issue, age effects must be eliminated in order to assess relations among measured constructs. Reanalyses of previous results were…

Analysis of 65 children over a 4-year period on tests of operational and causal thinking offers support for Piaget's notion of stage progression. In kindergarten and grade one, the majority of children in this longitudinal study were between preoperational and the achievement stage of operational thought. By grade two, the majority had attained…

This study sought to determine the extent to which instructional processes characterized by cognitive complexity influence the development of general cognitive abilities during the first, second, and third years of college. The sample for the study consisted of incoming first-year students at 18 four-year and 5 two-year colleges and universities…

PART OF A LARGER STUDY OF THE COGNITIVE ENVIRONMENTS OF PRESCHOOL CHILDREN, THIS EXPERIMENT EXAMINED THE RELATIONSHIPS BETWEEN MOTHERS' LANGUAGE STYLES AND THE CONCEPT ATTAINMENT OF THEIR PRESCHOOL CHILDREN. SPEECH SAMPLES WERE OBTAINED FROM 160 URBAN NEGRO MOTHERS OF FOUR SOCIOECONOMIC GROUPS (MIDDLE-CLASS, UPPER-LOWER, LOWER-LOWER, AND…

This study, using data from the National Study of Student Learning, examined whether participation in a collegiate work-study program was related to cognitive educational benefits. Data were collected from 2,485 entering students at 23 institutions nationwide in the fall of 1992 with follow-up in the spring of 1993, of whom 494 (19.9 percent)…

The longitudinal interrelations among age, visual and auditory short-term memory, and the concrete operational tasks of class inclusion and combinatorial reasoning were investigated over four testing occasions in a sample of 134 students, initially ranging from 5 to 12 years in age. The Piagetian task battery involved placement of colored…