Abstract:
:The encoding of letter position is a key aspect in all recently proposed models of visual-word recognition. We analyzed the impact of lexical frequency on letter position assignment by examining the temporal dynamics of lexical activation induced by pseudowords extracted from words of different frequencies. For each word (e.g., BRIDGE), we created two pseudowords: A transposed-letter (TL: BRIGDE) and a replaced-letter pseudoword (RL: BRITGE). ERPs were recorded while participants read words and pseudowords in two tasks: Semantic categorization (experiment 1) and lexical decision (experiment 2). For high-frequency stimuli, similar ERPs were obtained for words and TL-pseudowords, but the N400 component to words was reduced relative to RL-pseudowords, indicating less lexical/semantic activation. In contrast, TL- and RL-pseudowords created from low-frequency stimuli elicited similar ERPs. Behavioral responses in the lexical decision task paralleled this asymmetry. The present findings impose constraints on computational and neural models of visual-word recognition.
journal_name
Brain Langjournal_title
Brain and languageauthors
Vergara-Martínez M,Perea M,Gómez P,Swaab TYdoi
10.1016/j.bandl.2012.12.009subject
Has Abstractpub_date
2013-04-01 00:00:00pages
11-27issue
1eissn
0093-934Xissn
1090-2155pii
S0093-934X(13)00005-9journal_volume
125pub_type
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