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N200 And P300 Evoked By Stimuli Straddling Category Boundary In Lexical Context, Ji Young Lee

Theses and Dissertations (ETD)

Background and Objectives: Event-related potentials (ERPs) like N200 and P300 have been reported to reflect the categorical perception of speech. The purpose of the present study is to explore whether these ERP components reflect the influence of lexical context on categorical perception. Findings may provide evidence for bottom-up or top-down processing of speech. Methods: On a seven step series of the /bi/-/pi/ continuum, a two-forced choice labeling test was administered in two conditions: /bi/ context (e.g. bee sting) and /pi/ context (e.g. pea soup). From the labeling results, Stimulus 1which is a prototypical /bi/ was selected for standard stimuli, and …