Purpose: We investigated whether rhythm discrimination is mainly driven by the native language of the listener or by the fundamental design of the human auditory system and universal cognitive mechanisms shared by all people irrespective of rhythmic patterns in their native language. Method: In multiple experiments, we asked participants to listen…

Some contrasts in the second language (L2) impose difficulty in processing for learners, especially when these contrasts are not used phonemically in a learner's first language (L1). This thesis is to examine how American English speakers learning Japanese discriminate and store information regarding the L2 contrasts as a part of their lexicon…

Examined infants' tendency, from a few days to nine months of age, to prefer infant-directed over adult-directed speech. Results suggest that exaggerated pitch contours that characterize infant-directed speech may become salient communicative signals for infants through language-rich, interactive experiences with caretakers and increased…