Abstract
Inhibition in task switching can be inferred from n-2 repetition costs: slower responding to ABA sequences compared to CBA sequences. Although it is generally reported that advanced task-preparation does not lead to a reduction of the n-2 repetition cost, some recent authors have presented evidence and arguments for such a reduction. The present study sought to investigate the effects of manipulating an established component of task preparation: covert verbalisation of task rules. Experiment 1 attempted to interfere with task preparation by using articulatory suppression, which slowed responding but did not affect the n-2 repetition cost. Experiment 2 sought to aid task preparation by using task-relevant verbalisations, which facilitated responding, but again did not affect the n-2 repetition cost. The results add to the discussion of whether inhibition in task switching can be overcome given sufficient advanced preparation.
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