The acquisition of suprasegmental features in a second language (L2), like lexical tone and pitch accent, can be challenging, yet the impact of cross-linguistic similarity on learning these suprasegmental features has been underexplored. This study explored the role of cross-linguistic similarity in Chinese learners’ perception of Japanese pitch accents, aiming to verify the Perceptual Assimilation Model for Suprasegmentals (PAM-S). In experiment 1, 25 Chinese learners of Japanese with lower proficiency level and 24 learners with higher proficiency level completed a perceptual assimilation task (PAT) that examined the cross-linguistic perceptual similarity between Mandarin tones and Japanese pitch accents. In experiment 2, the same Chinese groups and 35 native Japanese listeners completed a perceptual discrimination test (PDT) of Japanese pitch accent contrasts. Results of PAT showed that Chinese learners successfully categorized Japanese pitch accents into their native Mandarin tone categories: they perceived Japanese H*L as Mandarin Tone 4 (falling tone), LH* as Tone 2 (rising tone), and LH as Tone 1 (level tone). Moreover, results of PDT showed that Chinese learners were able to discriminate H*L–LH* and H*L–LH but had difficulty in the discrimination of LH*–LH. The results also show that Chinese learners’ ability to discriminate Japanese pitch accent contrasts did not improve consistently with increased Japanese experience. This study argues that the LH*–LH contrast is hard for L2 learners regardless of their L2 experience, because of these two accents’ acoustic similarity. The results extended the PAM-S, suggesting that L2 speech perception could be influenced by both the L1–L2 assimilation patterns and acoustic similarity.
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