Two experiments used a formal model of developmental discontinuity derived from catastrophe theory to test whether the transition from Rule I to Rule II on the balance scale task proceeds discontinuously from ages 6 to 10, focusing on five catastrophe flags. Found that bimodality, inaccessible region, hysteresis, and sudden jump were clearly…

Argues that what matters is not the difference between learning and development, but the dynamic relationships that form the key to understanding. Examined two models of these relationships: (1) a semantic approach, distinguishing five dimensions along which learning and development can be compared; and (2) a mathematical nonlinear growth model…

Historically, articulation linkages between secondary and post-secondary institutions have focused on admissions and recruitment. However, with the rising aspirations of minority groups and the addition of community colleges to the educational continuum, educational articulation must take on new, more comprehensive dimensions. The articulation…

The article describes factors relevant to the psychoeducational model of intervention with behavior disordered students, including values, biological predispositions, psychological development, and continuity of experience. The therapeutic potential of the teacher and the curriculum in helping students generate personal resources for coping is…

This reaction paper offers evidence for the effectiveness of nondirective instructional models with special needs young children. The construct of "developmentally appropriate practice" is viewed as a working hypothesis and as a continuous variable, not a dichotomous variable. Relationships between early childhood education and early childhood…