withdrew before completing the study. Data on the remaining 28 subjects (aged 62–75 years, mean age 69.6 ± 3.7 SD, 14 female, all right-handed, mean years of education 16.4 ± 1.4 SD) were analyzed. Of the 18 subjects in Experiment 3, data from all 18 subjects were analyzed (aged 21–28 years, mean age 25.3 ± 2.3 SD, 9 female, all right-handed, mean years of education 16.1 ± 1.2 SD). Of the 42 younger adults from Experiment 1, 14 of the poorest performers were re-recruited and successfully completed Experiment 4 (aged 21–29 years, mean age 26.8 ± 1.8 SD, 9 female, all right-handed, mean years of education 14.8 ± 1.1 SD).
