There were no significant effects of age group on any of the standard psychometric measures. For both age groups combined, there was a significant correlation between digit and verbal span (Pearson’s r = 0.707, p < 0.01); spatial span was also significantly correlated with NART scores (r = 0.463, p < 0.01). The saccade latencies in the AST-s (r = -0.468, p < 0.01) and AST-go/no-go (r = -0.477, p < 0.01) were both significantly, negatively correlated with spatial span. There were no significant correlations between AST error rates and the psychometric measures for the young or old groups. However, for the young group, there was an unexpected correlation (r = 0.69, p = 0.003) between error rates in the AST-go/no-go task and the NART. This suggests that this demanding inhibition task yields fewer errors in those young people with greatest amount of cognitive reserve, and yields more errors in those with lower cognitive reserve as reflected in the NART premorbid IQ measure.