“…When amount of creative output is tabulated through adulthood, the level of productivity for most fields appears to peak around age 40 and to decline thereafter (Simonton, 1990). When quality or significance is considered, however, the ratio of high-quality works to amount of output shows no relation to age, but appears to be a function of other variables such as the particular discipline, or personality characteristics such as motivation and tenacity (Oromaner, 1977;Over, 1988).…”