Rapid Interactions between Lexical Semantic and Word Form Analysis during Word Recognition in Context: Evidence from ERPs

Albert Kim, Vicky Lai
2012 Journal of Cognitive Neuroscience  
■ We used ERPs to investigate the time course of interactions between lexical semantic and sublexical visual word form processing during word recognition. Participants read sentenceembedded pseudowords that orthographically resembled a contextually supported real word (e.g., "She measured the flour so she could bake a ceke...") or did not (e.g., "She measured the flour so she could bake a tont...") along with nonword consonant strings (e.g., "She measured the flour so she could bake a
more » ... ld bake a srdt..."). Pseudowords that resembled a contextually supported real word ("ceke") elicited an enhanced positivity at 130 msec (P130), relative to real words (e.g., "She measured the flour so she could bake a cake..."). Pseudowords that did not resemble a plausible real word ("tont") enhanced the N170 component, as did nonword consonant strings ("srdt"). The effect pattern shows that the visual word recognition system is, perhaps, counterintuitively, more rapidly sensitive to minor than to flagrant deviations from contextually predicted inputs. The findings are consistent with rapid interactions between lexical and sublexical representations during word recognition, in which rapid lexical access of a contextually supported word (CAKE) provides top-down excitation of form features ("cake"), highlighting the anomaly of an unexpected word "ceke." ■
doi:10.1162/jocn_a_00148 pmid:21981670 fatcat:fjxrxwox3jf7hdgieqfintiag4