Three studies of how workers construct knowledge associated with vocational practice were examined within a framework classifying dispositions as interest, attitudes, and values. Findings suggest that dispositions are rooted in individual history and participation in communities of practice and that consideration of how cognitive structures…

Two marble-and-ramp experiments investigated whether a simple-to-embedded-rules account can explain changes in children's causal reasoning. Results indicated that the same difference between three- and four-year olds in the prediction experiment appeared in the action experiment, suggesting that the same rules may underlie causal action as well as…