Effects of lexicon and coarticulation on phoneme perception.

Lexical and coarticulatory effects on phoneme perception are investigated by measuring reaction times for the phoneme/k/at various positions in Japanese words and nonwords presented to six subjects as naturally spoken or as synthesized by concatenating moras. Facilitatory lexical effects are found both in the naturally spoken and concatenated words at the final or penultimate mora regardless of word length. Facilitatory and accumulative coarticulatory effects are found in naturally spoken stimuli but not in concatenated stimuli.

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