Emotion, Etmnooi, or Emitoon? – Faster lexical access to emotional than to neutral words during reading

Abstract

Cortical processing of emotional words differs from that of neutral words. Using EEG event-related potentials (ERPs), the present study examines the functional stage(s) of this differentiation. Positive, negative, and neutral nouns were randomly mixed with pseudowords and letter strings derived from words within each valence and presented for reading while participants’ EEG was recorded. Results indicated emotion effects in the N1 (110–140ms), early posterior negativity (EPN, 216–320) and late positive potential (LPP, 432–500ms) time windows. Across valence, orthographic word-form effects occurred from about 180ms after stimulus presentation. Crucially, in emotional words, lexicality effects (real words versus pseudowords) were identified from 216ms, words being more negative over posterior cortex, coinciding with EPN effects, whereas neutral words differed from pseudowords only after 320ms. Emotional content affects word processing at pre-lexical, lexical and post-lexical levels, but remarkably lexical access to emotional words is faster than access to neutral words.