A 20-year longitudinal study was conducted to examine adult performance on practical problems. Effects of independent variables of age, education, and administration time were assessed on solutions generated and quality points earned. Younger adults generated more solutions than other adults in 1983, 1993, and 2003. Both younger and middle adults increased the number of solutions offered across the 2 decades, but older adults did not. Similar patterns were observed with number of quality points earned. Participants from all age groups and all education levels were aware of, and applied, some changes in technology over the 20-year period. (Contains 3 tables.)