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Front Psychol. 2013 Dec 11;4:937. doi: 10.3389/fpsyg.2013.00937. eCollection 2013.

Modality-specific organization in the representation of sensorimotor sequences.

Frontiers in psychology

Arnaud Boutin, Cristina Massen, Herbert Heuer

Affiliations

  1. IfADo - Leibniz Research Centre for Working Environment and Human Factors Dortmund, Germany.

PMID: 24376432 PMCID: PMC3858678 DOI: 10.3389/fpsyg.2013.00937

Abstract

Sensorimotor representations of movement sequences are hierarchically organized. Here we test the effects of different stimulus modalities on such organizations. In the visual group, participants responded to a repeated sequence of visually presented stimuli by depressing spatially compatible keys on a response pad. In the auditory group, learners were required to respond to auditorily presented stimuli, which had no direct spatial correspondence with the response keys: the lowest pitch corresponded to the leftmost key and the highest pitch to the rightmost key. We demonstrate that hierarchically and auto-organized sensorimotor representations are developed through practice, which are specific both to individuals and stimulus modalities. These findings highlight the dynamic and sensory-specific modulation of chunk processing during sensorimotor learning - sensorimotor chunking - and provide evidence that modality-specific mechanisms underlie the hierarchical organization of sequence representations.

Keywords: chunking; implicit/explicit processing; sensorimotor representation; sequence learning; stimulus modality

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