Applying Rasch model analysis in the development of the cantonese tone identification test (CANTIT). (30th October 2017)

• Record Type: Journal Article
• Authors: Lee, Kathy Y. S.; Lam, Joffee H. S.; Chan, Kit T. Y.; van Hasselt, Charles Andrew; Tong, Michael C. F.
• Is Part Of: International journal of audiology. Volume 56(2017)Supplement 2
• Page Start: S60
• Page End: S73
• Publication Date: 2017-10-30
• Subjects: Cochlear implant -- speech perception -- instrumentation -- paediatric -- hearing aids; Audiology -- Periodicals; Hearing disorders -- Periodicals; Deafness -- Prevention -- Periodicals; Hearing Disorders -- Periodicals; Hearing -- Periodicals; 617.8
• DOI: 10.1080/14992027.2017.1294766
• Languages: English
• ISSNs: 1499-2027

Abstract

Abstract: Objective : Applying Rasch analysis to evaluate the internal structure of a lexical tone perception test known as the Cantonese Tone Identification Test (CANTIT). Design : A 75-item pool (CANTIT-75) with pictures and sound tracks was developed. Respondents were required to make a four-alternative forced choice on each item. A short version of 30 items (CANTIT-30) was developed based on fit statistics, difficulty estimates, and content evaluation. Internal structure was evaluated by fit statistics and Rasch Factor Analysis (RFA). Study Sample : 200 children with normal hearing and 141 children with hearing impairment were recruited. Results : For CANTIT-75, all infit and 97% of outfit values were < 2.0. RFA revealed 40.1% of total variance was explained by the Rasch measure. The first residual component explained 2.5% of total variance in an eigenvalue of 3.1. For CANTIT-30, all infit and outfit values were < 2.0. The Rasch measure explained 38.8% of total variance, the first residual component explained 3.9% of total variance in an eigenvalue of 1.9. Conclusions : The Rasch model provides excellent guidance for the development of short forms. Both CANTIT-75 and CANTIT-30 possess satisfactory internal structure as a construct validity evidence in measuring the lexical tone identification ability of the Cantonese speakers.