Journal
NEUROREPORT
Volume 16, Issue 1, Pages 45-48Publisher
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/00001756-200501190-00011
Keywords
ERP; N1; plasticity; repetition priming; topography; training; visual expertise; visual symbol string processing; visual word processing
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The current study examined whether the repeated visual presentation of novel, meaningless symbol strings triggers rapid changes in event related potentials (ERP). Adult participants performed three versions of a word and symbol string repetition detection task in the same experimental session. Analyses focussed on the occipito-temporal NI (similar to 150 ms) known to reflect early word-specific processing and stimulus categorisation. While the NI to words did not change, the occipito-temporal negativity to symbol strings increased over runs and converged with the word NI. Later (similar to 220 ms) more positive occipito-temporal amplitudes to repeated words in the third compared to the first run implied a repetition priming effect. This suggests that symbol String processing changed over time due to visual learning and increased perceptual expertise. (C) 2005 Lippincott Williams Wilkins.
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