Examines the importance of (1) dimensional characteristics of stimuli present in discrimination transfer tasks, (2) having contrasting stimuli presented simultaneously, and (3) subjects age. Subjects were rural Mexican youths, ages 4 to 10. Reversal and nonreversal type discrimination transfer problems were used in the study. (DP)

This study attempts to determine if individual differences in multitask performance are due in part to the cognitive competence (i.e., the consistent, rule-based strategy) the subject brings to the task. A battery of learning (discrimination shift, transposition, incidental learning and paired-associate learning), cognitive-developmental…

Reviews "Levels of Cognitive Development," which presents a theory of cognitive development integrating discrimination- learning research with understanding of higher cognitive processes. Argues that strengths include its presentation of systematic research and providing continuity between past and present models. Weaknesses include…