Item Response Theory Modeling of the Verb Naming Test

Autor/inn/en	Fergadiotis, Gerasimos; Casilio, Marianne; Dickey, Michael Walsh; Steel, Stacey; Nicholson, Hannele; Fleegle, Mikala; Swiderski, Alexander; Hula, William D.
Titel	Item Response Theory Modeling of the Verb Naming Test
Quelle	In: Journal of Speech, Language, and Hearing Research, 66 (2023) 5, S.1718-1739 (22 Seiten) PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Fergadiotis, Gerasimos) ORCID (Dickey, Michael Walsh) ORCID (Swiderski, Alexander) ORCID (Hula, William D.)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1092-4388
Schlagwörter	Item Response Theory; Psychometrics; Verbs; Naming; Tests; Aphasia; Test Reliability; Test Items; Item Analysis; Test Validity; Scoring; Goodness of Fit + Suchen Sie Ihr Suchwort? Item-Response-Theorie; Psychometry; Psychometrie; Examination; Prüfung; Examen; Expressive Aphasie; Aphasie; Testreliabilität; Test content; Testaufgabe; Itemanalyse; Testvalidität; Bewertung
Abstract	Purpose: Item response theory (IRT) is a modern psychometric framework with several advantageous properties as compared with classical test theory. IRT has been successfully used to model performance on anomia tests in individuals with aphasia; however, all efforts to date have focused on noun production accuracy. The purpose of this study is to evaluate whether the Verb Naming Test (VNT), a prominent test of action naming, can be successfully modeled under IRT and evaluate its reliability. Method: We used responses on the VNT from 107 individuals with chronic aphasia from AphasiaBank. Unidimensionality and local independence, two assumptions prerequisite to IRT modeling, were evaluated using factor analysis and Yen's Q[subscript 3] statistic (Yen, 1984), respectively. The assumption of equal discrimination among test items was evaluated statistically via nested model comparisons and practically by using correlations of resulting IRT-derived scores. Finally, internal consistency, marginal and empirical reliability, and conditional reliability were evaluated. Results: The VNT was found to be sufficiently unidimensional with the majority of item pairs demonstrating adequate local independence. An IRT model in which item discriminations are constrained to be equal demonstrated fit equivalent to a model in which unique discrimination parameters were estimated for each item. All forms of reliability were strong across the majority of IRT ability estimates. Conclusions: Modeling the VNT using IRT is feasible, yielding ability estimates that are both informative and reliable. Future efforts are needed to quantify the validity of the VNT under IRT and determine the extent to which it measures the same construct as other anomia tests. (As Provided).
Anmerkungen	American Speech-Language-Hearing Association. 2200 Research Blvd #250, Rockville, MD 20850. Tel: 301-296-5700; Fax: 301-296-8580; e-mail: slhr@asha.org; Web site: http://jslhr.pubs.asha.org
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01