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A visual M170 effect of morphological complexity

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Publication details

JournalLanguage and Cognitive Processes
DatePublished - 2009
Issue number3
Volume24
Number of pages28
Pages (from-to)412-439
Original languageEnglish

Abstract

Recent masked priming studies on visual word recognition have suggested that morphological decomposition is performed prelexically, purely on the basis of the orthographic properties of the word form. Given this, one might expect morphological complexity to modulate early visual evoked activity in electromagnetic measures. We investigated the neural bases of morphological decomposition with magnetoencephalography (MEG). In two experiments, we manipulated morphological complexity in single word lexical decision without priming, once using suffixed words and once using prefixed words. We found that morphologically complex forms display larger amplitudes in the M170, the same component that has been implicated for letterstring and face effects in previous MEG studies. Although letterstring effects have been reported to be left-lateral, we found a right-lateral effect of morphological complexity, suggesting that both hemispheres may be involved in early analysis of word forms.

    Research areas

  • Lexicon, MEG, M170, Morphological decomposition, EVENT-RELATED POTENTIALS, LETTER-STRING PERCEPTION, FUSIFORM FACE AREA, WORD FORM AREA, TIME-COURSE, NEUROMAGNETIC EVIDENCE, TEMPORAL CORTEX, LEXICAL STORAGE, EYE-MOVEMENTS, MEG-DATA

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