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Measurement Characteristics of the Slovenian Translation of the Frenchay Aphasia Screening Test

Teja Hržič and Suzana Knavs (2022) Measurement Characteristics of the Slovenian Translation of the Frenchay Aphasia Screening Test. MSc thesis.

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    Abstract

    Aphasia is a neurological disorder that affects an individual’s ability to communicate. It often occurs after a stroke as a consequence of a damage to the speech-language areas in the brain. We observe problems in the areas of expression, comprehension, reading and writing in a person with aphasia. Screening tests have been developed for the purpose of faster identification of this type of disorder. By using them, it is easier to determine the need for further speech-language testing. Enderby et al. (1986) designed the Frenchay Aphasia Screening Test (FAST) to aid in the early detection of aphasia. As there is no standardised screening test for aphasia in the Slovenian cultural and linguistic space, the University Rehabilitation Institute in Ljubljana decided to translate and adapt the FAST test. The test is designed to assess four main aspects of language that are often impaired in people with aphasia: speaking, speaking comprehension, reading and writing. The aim of the thesis was to check the measurement characteristics of the Slovenian translation of the FAST screening test. We wanted to verify the thresholds for determining the presence of aphasia in the Slovenian population and to assess whether the reliability and validity of the test are sufficient for the use of FAST in the Slovenian language area. Additionally, we wanted to know whether gender and age are associated with the test scores. The study included 60 people from the general population, 35 people with chronic aphasia to assess inter-observer reliability, and 50 hospitalised people after stroke to assess concurrent validity. The results showed that within the general population, older participants scored less points on average. One-way analysis of variance confirmed that the average score statistically significantly decreased between age groups (p < 0.001), and gender was not statistically significantly associated with FAST scores (p = 0.320). The lowest test score in those under the age of 60 was 28 points, and among the elderly it was 25 points. We also checked the adequacy of the norms of the original study by Enderby et al. (1986), which proved to be appropriate. Agreement between assessors was estimated using intra-class correlation coefficient (ICC), and it proved to be almost perfect (ICC = 0.998; p < 0.001). The average scores of the assessors were between 18.7 and 18.8 points for the overall FAST score. Content validity was confirmed by three experts. Their ratings showed that the speech and reading sets are flawless in this regard, and the other two sets are close to that. To assess concurrent validity, FAST scores were compared to the external evaluation by a speech therapist, the location of the brain injury and the physician's referral of the patient to a speech therapy examination. The results were evaluated using Cohen κ coefficient. FAST was shown to achieve perfect sensitivity (100%) and a high degree of agreement with the external assessment of a speech therapist (κ = 0.65; p ≤ 0.001), followed by referral to speech therapy as the external criterion (κ = 0.55; p ≤ 0.001); using the site of brain injury as the criterion, concurrent validity was the lowest (κ = 0.43; p ≤ 0.001). The specificity of the test was the highest in the referral of a person to speech therapy (82%). Based on these results, we can conclude that FAST is valid and reliable for use in Slovenia.

    Item Type: Thesis (MSc thesis)
    Keywords: aphasia, screening test, FAST, measurement characteristics, language ability
    Number of Pages: 80
    Language of Content: Slovenian
    Mentor / Comentors:
    Mentor / ComentorsIDFunction
    prof. dr. sc. Emica FaragoMentor
    prof. dr. Gaj VidmarComentor
    Link to COBISS: https://plus.si.cobiss.net/opac7/bib/peflj/112323587
    Institution: University of Ljubljana
    Department: Faculty of Education
    Item ID: 7235
    Date Deposited: 21 Jun 2022 14:16
    Last Modified: 21 Jun 2022 14:16
    URI: http://pefprints.pef.uni-lj.si/id/eprint/7235

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