Item Response Theory Modeling of the Verb Naming Test.

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 ₃ statistic (Yen, 1984), respectively.

SUBMITTER: Fergadiotis G 

PROVIDER: S-EPMC10457085 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature