“…The British Abi/ity Scales (Elliott et al, 1978) include some very broad age norms for the Verbal Nirency measure, and some workers (e.g., Alpaugh et al, 1976;Jaquish and Ripple, 1981) have investigated changes in creative thinking abilities across the adult life-span. Although some longitudinal studies have been made of the predictive validity of divergent tests (e.g., Torrance, 1969;Cropley, 1972), Kogan and Pankove's (1972) experiment is one of the very few in the literature that has specifically investigated age-related changes in children's performance on these tests (which the authors equate with ' creative ability '). They retested samples of 10-year-old middle-class schoolchildren after a 5-year period in an attempt to establish the longitudinal stability of Wallach and Kogan's (1965) measures of ideational productivity and uniqueness.…”