Suggests that Kuhn's study reported in this issue (PS 524 345) offers insight into how people make casual inferences, and raises important questions about these processes. (JW)

Responds that questions of study by Kuhn and others (PS 524 345) in this issue were motivated by concerns about the role of scientific thinking in general thinking, not in development of scientific reasoning. Study was meant to increase understanding of role of strategies in development, not provide definitive explanation of how strategies fit…

Used a microgenetic method to examine knowledge acquisition as a process by coordinating existing theories with new evidence. Subjects were 17 community college students (ages 22-47) and 15 fourth graders. Assessed knowledge acquisition in problem solving in both physical and social domains. Found multiple strategies for, and varying levels of,…

Suggests study by Kuhn and others (PS 524 345) is too ambitious and that the processes described are not wholly representative of developmental stages. Argues the methodology of study was progressive problem solving, and that experimenter's questions resulted in contrived stages. (JW)