There are clear age-related changes in field dependence over the life span. Developmental curves for the EFT, RFT and BAT, covering the 8-to-24-year period, show a marked, continuous increase in field independence between 8 and about 15 years, although in this period the rate of change slows down with increasing age ( Witkin, Goodenough and Karp, 1967). After age 15 the developmental curves show a levelling off and approach a plateau in the period of young adulthood. In geriatric groups there is a marked “return to field dependence” (Comalli, 1965: Schwartz and Karp, 1967). At some point between 24 years and old age the process of increasing field dependence begins: the limited evidence now available from cross-sectional studies suggests that this point may be somewhere in the late 30’s, after which the rate of change toward greater field dependence accelerates.