| Abstract: | Two studies were conducted to determine the relations among age, motor speed, perceptual speed, and 3 measures of cognitive performance: study time, decision time, and decision accuracy. Each study involved over 240 adults (all Ss aged 18–87 yrs) who performed a battery of tests, including computer-administered tests of memory, reasoning, and spatial ability. Results indicate that (1) increased age was associated with lower accuracy as well as with longer study time and decision time and (2) some of the relations between age and decision accuracy and between age and decision time appear to be mediated by a slower rate of executing cognitive operations. (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
