ABSTRACT
The purposes of this chapter are to articulate an agenda for cognitive developmentalists and to consider how well it is being met. It is suggested that cognitive developmentalists should be addressing two major questions: What are the ways that cognition changes with age? and What are the causes of this change? An overview of alternative approaches to the study of cognitive development is presented, and an integrative, three tier model, framed within a multidisciplinary perspective is forwarded. It is argued that research on cognitive development has made considerable progress with respect to describing the ways that cognition changes with age but has failed in explaining the causes of age change. Some conceptual reasons for the paucity of such information are discussed, and recommendations are made for the reconceptualization of research design, adoption of a life span perspective, and reassessment of assumptions.
