關於CAS小朋友speech perception 能力的研究並不多，十隻手指數得完，而且全都集中於segmental information。Perception of suprasegmental information 是完全無資料的。這份研究就是想知道CAS小朋友能不能夠辦別廣東話字詞中的聲調。
兩名CAS小朋友進行廣東話聲調辨識測驗 (Cantonese Tone Identification Test; Lee, 2012)後，得到以下結論： 1. Difficulties in identifying lexical tones 2. Perceptual difficulties 3. Support expert opinions about the deficits in identifying/perceiving lexical tones (Wong, 2017).
Presentation 嘅 powerpoint 同 abstract，可以喺呢到搵到： https://www.researchgate.net/…/332289892_Lexical_Tone_Ident…
參考資料： Lee, K.Y.S. (2012). Cantonese Tone Identification Test (CANTIT). Hong Kong: Department of Otorhinolaryngology, Head and Neck Surgery, The Chinese University of Hong Kong.
Wong, E. C. H. (2017). Development of a treatment protocol for Cantonese-speaking children with childhood apraxia of speech: case study (Unpublished Master Thesis). The Chinese University of Hong Kong: Hong Kong.
Wong, E. C. H. & Lee, K. Y. S. (2018, November). Lexical tone identification in childhood apraxia of speech: two cases studies. Paper presented at Speech and Hearing Symposium 2018, Hong Kong, Hong Kong SAR.
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