This study examined the ability of 59 2- and 3-year-old children to monitor goal-directed activities with respect to an anticipated outcome. The study focused on two skills: error monitoring and error avoidance through anticipatory monitoring. To elicit monitoring, a variety of simple tasks were presented to the children. In each, a successful…

This series of four experiments on children's causal sequences was directed at: (1) extending Brown's research on temporal ordering to causal relationships portrayed in picture sequences; (2) investigating the developmental progression of skills involved in understanding and remembering sequences; and (3) examining the development of reversible…

This study tested certain implied predictions regarding conceptual learning at each of four sequential levels of development: concrete level, identity level, classificatory level, and formal level. For this purpose, scaled batteries to assess the level of conceptual development of children, kindergarten through high school, were constructed and a…

The effects of conservation activities on children's acquisition of Piaget's conservation concepts were investigated. One hundred and twenty-eight seven-to nine-year-old children in four classrooms were given pre- and post-evaluation measures of conservation ability. The experimental group completed a set of 42 self-directed conservation…