ARE THE IMPORTANT INDIVIDUAL-DIFFERENCES BETWEEN OR WITHIN INDIVIDUALS

Within-individual differences have been a common finding in a variety of research areas. Such inconsistencies with individuals are argued to represent an important consideration for researchers concerned with between-individual differences. Cognitive Flexibility (availability in the individual's repertoire of several alternative types of strategies or processes, and ability to select the one(s) of the alternatives that are most effective for the required task) is suggested to be an important individual-difference variable. Some methodological problems in the assessment of cognitive flexibility as related to human memory are discussed, along with possible ways of overcoming these methodological difficulties, and some limited evidence for the importance of cognitive flexibility in research on personality as well as ability differences. © 1979.