Visuo-verbal interactions in working memory: evidence from event-related potentials |
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Authors: | Peters Jan Suchan Boris Zhang Yaxin Daum Irene |
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Affiliation: | International Graduate School of Neuroscience, Ruhr-University Bochum, Germany. jan.peters_@web.de |
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Abstract: | Working memory is thought to involve separate modality-specific storage systems. Interactions between these storage systems were investigated using a novel cross-modal 2-back paradigm. 2-back, 1-back and target items were presented either visually as a verbalizable linedrawing or auditorily as a digitized spoken word. ERPs for auditory targets were primarily modulated by the presentation modality of the 2-back item, whereas ERPs for visual targets were largely modulated by presentation modality of the 1-back item. Results indicate that verbalizable pictures are only partially transformed into a phonological code for rehearsal in working memory. Furthermore, results support the idea of a more stable and persistent auditory short-term store as opposed to a more transiently activated visual store for verbalizable material. |
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