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. 2023 Jan:230:105292.
doi: 10.1016/j.cognition.2022.105292. Epub 2022 Oct 1.

Suppression-induced forgetting of motor sequences

Markus Schmidt  1 , Michael C Anderson  2 , Tobias Tempel  3
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Free article

Suppression-induced forgetting of motor sequences

Markus Schmidt et al. Cognition. 2023 Jan.
Free article

Abstract

Two experiments examined the effects of deliberately suppressing retrieval of motor sequences on their later recall, in the think/no-think paradigm (Anderson & Green, 2001). After several motor sequences had been associated with individual cues through repeated practice cycles, a subset of these sequences was retrieved in response to their respective cues (think trials), whereas other sequences were suppressed. In such no-think trials, cues were shown but participants were instructed to withhold the associated motor response and to suppress its recollection. We found that suppressing retrieval impaired later memory performance for the suppressed sequences in comparison to items that were not cued at all after their initial training (baseline sequences). Suppression impaired later sequence recall and sequence speed although in different ways depending on the training level: with higher initial training of sequences (Experiment 1), suppression impaired reaction time, but not recall accuracy; with lower initial training (Experiment 2), suppression reduced recall accuracy. Reaction time analyses revealed a consistent slowing of movement execution for suppressed sequences. These findings show that inhibitory control processes engaged during retrieval suppression can influence memory representations of motor actions, by not only reducing their accessibility but also by affecting their execution, once retrieved.

Keywords: Executive control; Forgetting; Inhibition; Motor sequences; Suppression-induced forgetting.

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