Reported are results of a study designed to determine developmental patterns in proportional reasoning and to determine if these patterns are similar regardless of educational level and regardless of problem context. Data from 2282 subjects in grades 6-13 were collected using the Test of Logical Thinking (TOLT), and then examined for subjects who…

Explores developmental patterns in children from kindergarten through grade six. Highlights physical development, including height, activity level, motor skills, and health; mental development, including abstract thought, academic focus, learning difficulties, subject preferences, and creativity; psychosocial development, including interpersonal…