Challenges assumptions made by Sigel that change is a measure of progress, that Piaget's theory was a major factor in the "cognitive revolution," and that cognitive psychology and behaviorism are necessarily opposing positions. (Author/RH)

Sigel replies that Kendler's reactions to his article appear more appropriate to psychology as a field rather than to developmental psychology, in particular, since the 1970s. (Author)

Reviews continuities and discontinuities in the field of developmental psychology between 1970 and the early 1980s, limiting discussion to areas of cognition and learning. Three major theoretical trends are identified: Piagetian, behavioristic, and information-processing. The field is perceived as fragmented, and it is expected that such…