A new model is proposed for explaining children's performance on Pascual-Leone's test of M-space. The new model is used to generate theoretical performance curves for children at four different age levels and seven different levels of stimulus complexity, and it is a viable alternative. Differences between the models are reviewed. (Author/RD)

Young children's thinking is subject to constraints which interfere with instruction, and a developmental approach may be useful in minimizing the detrimental effects of these constraints. The approach is particularly beneficial to handicapped children, those who require remedial work, and adults with inadequate working memory for the specific…