PROCESS ANALYSIS OF ADULT AGE EFFECTS ON A COMPUTER-ADMINISTERED TRAIL MAKING TEST

Two studies were conducted in which healthy adults of different ages p erformed computer-administered tests resembling the R. M. Reitan (1992 ) Trail Making Test. In both studies, increased age was associated wit h slower performance, but there were no age differences in the efficie ncy of the path used to connect the targets. Analyses of independent a ge-related influences revealed that most of the age differences in tra il-making performance were attributable to a slower speed of executing relevant operations.