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Item Response Theory Modeling of the Verb Naming Test
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Fergadiotis, Gerasimos; Casilio, Marianne; Dickey, Michael Walsh; Steel, Stacey; Nicholson, Hannele; Fleegle, Mikala; Swiderski, Alexander; Hula, William D. – Journal of Speech, Language, and Hearing Research, 2023
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…
Descriptors: Item Response Theory, Psychometrics, Verbs, Naming
Enhancing the Efficiency of Confrontation Naming Assessment for Aphasia Using Computer Adaptive Testing
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Fergadiotis, Gerasimos; Hula, William D.; Swiderski, Alexander M.; Lei, Chia-Ming; Stacey Kellough – Journal of Speech, Language, and Hearing Research, 2019
Purpose: In this study, we investigated the agreement between the 175-item Philadelphia Naming Test (PNT; Roach, Schwartz, Martin, Grewal, & Brecher, 1996) and a 30-item computer adaptive PNT (PNT-CAT; Fergadiotis, Kellough, & Hula, 2015; Hula, Kellough, & Fergadiotis, 2015) created using item response theory (IRT) methods. Method: The…
Descriptors: Computer Assisted Testing, Aphasia, Naming, Test Validity
Refining Semantic Similarity of Paraphasias Using a Contextual Language Model
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Salem, Alexandra C.; Gale, Robert; Casilio, Marianne; Fleegle, Mikala; Fergadiotis, Gerasimos; Bedrick, Steven – Journal of Speech, Language, and Hearing Research, 2023
Purpose: ParAlg (Paraphasia Algorithms) is a software that automatically categorizes a person with aphasia's naming error (paraphasia) in relation to its intended target on a picture-naming test. These classifications (based on lexicality as well as semantic, phonological, and morphological similarity to the target) are important for…
Descriptors: Semantics, Computer Software, Aphasia, Classification
Empirical Evaluation of Computer-Adaptive Alternate Short Forms for the Assessment of Anomia Severity
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Hula, William D.; Fergadiotis, Gerasimos; Swiderski, Alexander M.; Silkes, JoAnn P.; Kellough, Stacey – Journal of Speech, Language, and Hearing Research, 2020
Purpose: The purpose of this study was to verify the equivalence of 2 alternate test forms with nonoverlapping content generated by an item response theory (IRT)--based computer-adaptive test (CAT). The Philadelphia Naming Test (PNT; Roach, Schwartz, Martin, Grewal, & Brecher, 1996) was utilized as an item bank in a prospective, independent…
Descriptors: Adaptive Testing, Computer Assisted Testing, Severity (of Disability), Aphasia