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Chunk #13 — 2. METHODS AND MATERIALS — 2.3. Lexical Decision Task

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Reduced resource optimization in male alcoholics: N400 in a lexical decision paradigm.
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Semantic priming in the current study was investigated using a lexical decision task that required subjects to indicate when a stimulus was a word or a non-word with a button press using a different hand for each category. The hand used for the button press to indicate word and non-word were counter-balanced across subjects. Subjects were told to respond as quickly and as accurately as possible. The subjects were sequentially presented with a partially randomized list of 150 words and 150 non-words with a uniform inter-stimulus interval of 1600 ms. The exposure time for each stimulus was 150 ms. Among the 150 words, 100 words were part of 50 antonym pairs. For example, antonyms like TOP, BOTTOM, were always presented consecutively. Here the first word of the antonym pair was considered as the priming word or ‘Prime’, and the second word of the antonym pair as ‘Primed’. Thus, in total there were 50 Prime and 50 Primed words. These antonym pairs were always preceded and followed by non-words. The remaining 50 words were not part of antonym pairs and were