Abstract
This study tested whether the Perceptual Assimilation Model of Second Language Speech Learning (PAM-L2) predicts second language (L2) Cantonese tone discrimination across different perceptual modes. Punjabi speakers of Cantonese completed the Cantonese tone assimilation and discrimination tasks. In the assimilation task, the Punjabi listeners assimilated the Cantonese tones as two-category (TC), single-category (SC), uncategorized-categorized without overlap (UC-no), and uncategorized-categorized with partial overlap (UC-po) pairs, yielding testable predictions for PAM-L2 in the discrimination task (TC = UC-no > UC-po > SC). In the discrimination task, the model-driven predictions were largely supported in the double-talker context but not in the single-talker and pure tone contexts. These results suggest that PAM-L2 applies to phonological but not non-phonological discrimination of L2 tones. Moreover, our findings indicate that the distinction between partial and complete overlap may not be necessary for UC pairs.
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