An ERP study of cross-modal rhyming: Influences of phonology and orthography.

In a cross-modal rhyming study with visual pseudoword primes and auditory word targets, we found a typical ERP rhyming effect such that nonrhyming targets elicited a larger N400/N450 than rhyming targets. An orthographic effect was also apparent in the same 350- to 600-ms epoch as the phonological effect: The rhyming effect for targets with rime orthography that did not match their primes' (e.g., tain-"sane") was smaller over the left hemisphere than the rhyming effect for targets with rime orthography that did match their primes' (e.g., nain-"gain"), although the spellings of the auditory word targets were never explicitly shown. Our results indicate that this cross-modal ERP rhyming effect indexes both phonological and orthographic processing-for auditory stimuli for which no orthography is presented in the task. This pattern of findings is consistent with the notion of coactivation of sublexical orthography and phonology in fluent adult readers as they both read and listen.