Tau-U: A Quantitative Approach for Analysis of Single-Case Experimental Data in Aphasia

American Journal of Speech-language Pathology
Jaime B Lee, Leora R Cherney

Abstract

Tau-U is a quantitative approach for analyzing single-case experimental design (SCED) data. It combines nonoverlap between phases with intervention phase trend and can correct for a baseline trend (Parker, Vannest, & Davis, 2011). We demonstrate the utility of Tau-U by comparing it with the standardized mean difference approach (Busk & Serlin, 1992) that is widely reported within the aphasia SCED literature. Repeated writing measures from 3 participants with chronic aphasia who received computer-based writing treatment are analyzed visually and quantitatively using both Tau-U and the standardized mean difference approach. Visual analysis alone was insufficient for determining an effect between the intervention and writing improvement. The standardized mean difference yielded effect sizes ranging from 4.18 to 26.72 for trained items and 1.25 to 3.20 for untrained items. Tau-U yielded significant (p < .05) effect sizes for 2 of 3 participants for trained probes and 1 of 3 participants for untrained probes. A baseline trend correction was applied to data from 2 of 3 participants. Tau-U has the unique advantage of allowing for the correction of an undesirable baseline trend. Although further study is needed, Tau-U shows promise as ...Continue Reading

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Citations

Jul 29, 2018·American Journal of Speech-language Pathology·Lisa D BunkerJulie L Wambaugh
Jun 26, 2020·American Journal of Speech-language Pathology·Suma R DevangaJulie A Hengst
Jul 28, 2019·Journal of Speech, Language, and Hearing Research : JSLHR·Richard K PeachChristine Fisher
Aug 25, 2020·Topics in Language Disorders·Erica L MiddletonKatherine A Rawson
Nov 10, 2020·Disability and Rehabilitation·Sam HarveyMiranda L Rose
Nov 17, 2020·Journal of Speech, Language, and Hearing Research : JSLHR·Christine S-Y NgMary Alt
Feb 23, 2021·Assistive Technology : the Official Journal of RESNA·Shelley E ChapinDavid L Lee
Feb 25, 2021·International Journal of Language & Communication Disorders·Siȃn Wood, Penny Standen
Aug 25, 2021·American Journal on Intellectual and Developmental Disabilities·Stephanie Y ShireStacy Arbuckle

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Aphasia

Aphasia affects the ability to process language, including formulation and comprehension of language and speech, as well as the ability to read or write. Here is the latest research on aphasia.