The amplitudes of correctly executed saccades were collated, in order that the spatial accuracy of saccades between the conditions, as well as between the two age groups could be assessed. Accuracy was calculated as the absolute error of the eye landing position in relation to the target. Trials in which participants looked in a direction contrary to the task requirements (i.e., where participants look towards the target in AST conditions; where participants looked towards the target in no-go trials of the AST-go/no-go conditions; or where participants failed to look at the target in PST) were classed as errors, and were analyzed separately to valid trials. The number of such directional errors was recorded, and the proportional error rate was calculated as the absolute number of errors divided by the number of valid trials recorded for that participant in that condition. Repeated-measures analyses of variance using SPSS (v22) were conducted in order to distinguish the effects of WM and IC on the different tasks. Mauchly’s test was used to examine any violations of sphericity in the repeated-measures analyses. Where Mauchly’s failed to reject the null hypothesis of sphericity, the Greenhouse-Geisser, Huyn-Feldt, and Lower-Bound corrections were examined using the corrected degrees of freedom. As all the effects remained statistically significant (p < 0.01), for both the sphericity assumed and sphericity corrected, we only report the F- and p-values for the sphericity unassumed analyses. The Levene’s test was used to examine the assumption of homogeneity of variance. Where this assumption was not satisfied, we re-examined the analyses using square-root transformation. As the pattern of results was unchanged and remained significant at p < 0.01, we report the statistics for the untransformed data.