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The Validity and Reliability of the Language Battery in Comprehensive Aphasia Test-Turkish (CAT-TR)

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Abstract

Aphasia assessment is the initial step of a well-structured language therapy. Therefore, it is reasonable to underline that the assessment tools need to consider the typological and cultural characteristics of the language. A group of international researchers in the Collaboration of Aphasia Trialists have been adapting the Comprehensive Aphasia Test (CAT) into 14 languages spoken in Europe including Turkish. Thus, the aim of this study was to perform the validity and reliability analyses of the Language Battery section of CAT-TR to ensure the assessment of Turkish-speaking people with aphasia (PWA). The test included 21 sub-tests and yielded six modality scores (spoken language comprehension, written language comprehension, repetition, naming, reading, writing). Ninety PWA (Mean AGE = 61.07) and 200 controls (Mean AGE = 54.89) involved in the analyses. The participants were stratified into two education and three age groups. The analyses belonging to content, construct and criterion validity were performed, while the reliability analyses included internal consistency, test-retest and inter-rater reliability. Education influenced all the modality scores of the controls, while age-related differences were significant among all the modality scores except reading. It has to be underlined that Education did not hold any significant effects on the language performance of PWA, whereas those younger than 60 showed statistically better performance in the Spoken and Written Language Comprehension modality scores. The cut-off scores for each modality and Language Battery were presented with high sensitivity and specificity values. Compared to the psychometric characteristics of the adapted versions of CAT and aphasia tests utilized in Turkey, CAT-TR is an appropriate test for the language assessment of Turkish-speaking adults with aphasia.

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Acknowledgements

The second and third authors wish to thank Anadolu University for the financial support (no. 1509S632) that let them join ISCH COST Action IS1208 supporting Collaboration of Aphasia Trialists (CATs) between 2013 and 2017. CATs is now funded by the Tavistock Trust for Aphasia based in the UK (2017–2023). The authors of this study are members of the CATs. The first author completed this study in the requirements for a Ph.D. thesis in Speech and Language Therapy at Anadolu University (Eskişehir, Turkey) under the supervision of the second author. This study was presented as an oral presentation in 18th Turkish Neuroscience Congress (USK2020) between 6 and 9 November 2020 in Ankara (Turkey). The authors thank Charles Carmel Sant for his assistance in copyediting.

Funding

It was funded by Anadolu University (no. 1509S632) and the Scientific and Technological Research Council of Turkey (TÜBİTAK) under the 2214-A programme.

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Authors and Affiliations

  1. Department of Speech and Language Therapy, Faculty of Health Sciences, Muğla Sıtkı Koçman University, Kötekli, Menteşe, 48000, Muğla, Turkey

    Şevket Özdemir & Aylin Müge Tunçer

  2. Department of Speech and Language Therapy, Faculty of Health Sciences, Anadolu University, Eskişehir, Turkey

    İlknur Maviş

Authors
  1. Şevket Özdemir
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  2. İlknur Maviş
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  3. Aylin Müge Tunçer
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Contributions

Şevket Özdemir (design, data collection, data analysis and interpretation, literature review, writer), İlknur Maviş (conception, design, supervision, critical review), Aylin Müge Tunçer (conception, design, data analysis and interpretation, critical review).

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Correspondence to Şevket Özdemir.

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Özdemir, Ş., Maviş, İ. & Tunçer, A.M. The Validity and Reliability of the Language Battery in Comprehensive Aphasia Test-Turkish (CAT-TR). J Psycholinguist Res 51, 789–802 (2022). https://doi.org/10.1007/s10936-022-09850-2

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