The WM hypothesis predicts an interaction between age group and the tasks; according to this hypothesis, the older group should reveal disproportionate slowing on the AST-mem task, due to the fact that the AST-mem places a high load on spatial memory (together with a low inhibition load – eye-movements were permitted to the prepotent target). The IC hypothesis also predicts an interaction between age group and task. However, according to the IC hypothesis, the older group should show a greater slowing in the AST-go/no-go, due to the fact that this task demands a higher level of IC than the AST-s (together with a low load on WM). Therefore, we submitted the latency data to a 2 (age group) × 4 (task) mixed ANOVA. This analysis revealed that there was an overall increase in mean reaction times for the older adults [Group effect: F(1,29) = 12.716, p = 0.001, η2 = 0.305]. Critically, there was a significant task × group interaction [F(3,87) = 8.008, p = 0.001, η2 = 0.216]. In support of the IC hypothesis, Figures 2 and 4 reveal that the saccade latencies of the older groups were disproportionately slowed in the AST-go/no-go task. To determine the source of this interaction, we conducted a series of t-tests to evaluate the effect of age group in each of the three AST tasks. The t-tests revealed that there was a significant effect of age group in the AST-go/no-go task [t(29) = -3.282, p = 0.003], but there was no age group effect for the AST-s [t(29) = -1.419, p = 0.167], or AST-mem tasks [t(29) = -0.128, p = 0.899].