L2 sounds present different kinds of challenges to learners at the phonetic, phonological, and lexical levels, but previous studies on L2 tone learning mostly focused on the phonetic and lexical levels. The present study employs an innovative technique to examine the role of prior tonal experience and musical training on forming novel abstract syllable-level tone categories. Eighty Cantonese and English musicians and nonmusicians completed two tasks: (a) AX tone discrimination and (b) incidental learning of artificial tone-segment connections (e.g., words beginning with an aspirated stop always carry a rising tone) with synthesized stimuli modeled on Thai. Although the four participant groups distinguished the target tones similarly well, Cantonese speakers showed abstract and implicit knowledge of the target tone-segment mappings after training but English speakers did not, regardless of their musical experience. This suggests that tone language experience, but not musical experience, is crucial for forming novel abstract syllable-level tone categories.

This article reports an experiment on the implicit learning of second language stress regularities, and presents a methodological innovation on awareness measurement. After practising two-syllable Spanish words, native Cantonese speakers with English as a second language (L2) completed a judgement task. Critical items differed only in placement of stress. We assessed participants’ awareness of the hidden stress regularities by verbal reports and a novel methodology: inclusion–exclusion production tasks adapted from Jacoby (1991) and from Destrebecqz and Cleeremans (2001). Participants who remained unaware of the underlying regularities nevertheless performed significantly above chance in identifying correctly pronounced novel words. We conclude that L2 word stress regularities may be learnt implicitly.

Despite the growing interest in the phenomenon of learning without intention, the incidental learning of phonological features, especially prosodic features, has received relatively little attention. This paper reports an experiment on incidental learning of lexical stress rules, and investigates whether the resultant knowledge can be unconscious, abstract, and rule based. Participants were incidentally exposed to a lexical stress system where stress location of a word is mainly determined by the final phoneme, syllable type, and syllable weight. Learning was assessed by a pronunciation judgment task. Results indicate that participants were able to transfer their knowledge of stress patterns to novel words whose final phoneme was not previously encountered, suggesting that participants had acquired abstract and potentially rule-based knowledge. The combined use of subjective and objective measures of awareness in the present study provides a strong piece of evidence of the acquisition of implicit knowledge.

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