There was also a strong trend for an interaction with congruency for the SM group by comparison both with respect to the CTLs (Basic Groups ANOVA – F (1,74) = 3.56, p = 0.06) and with respect to the Other Patient Groups (Within Lesion Groups ANOVA – F (1,39) = 3.81, p = 0.06).
Loss of these monitoring functions might be expected to lead both to a particular slowing in the switch condition compared to single task conditions, and this is indeed found, and also to an increase in errors, and there is a near-significant trend for such an increase.
The difference in the error switch-cost between the Short and Long Cue conditions is highly significant and opposite to that to be expected if task-set reconfiguration is occurring during the preparation interval.