First Advisor

Gerasimos Fergadiotis

Term of Graduation

Spring 2021

Date of Publication


Document Type


Degree Name

Master of Science (M.S.) in Speech and Hearing Sciences


Speech and Hearing Sciences




Computer adaptive testing, Anomia, Ability -- Testing, Item response theory, Aphasia



Physical Description

1 online resource (v, 24 pages)


Computer adaptive testing formats, based in item response theory (IRT), are becoming an increasingly popular approach to testing in healthcare because they offer numerous psychometric and practical advantages to assessment when compared to static tests that rely on classical test theory. Fergadiotis and colleagues (2015) have developed computer adaptive versions of the Philadelphia Naming Test (PNT) short-forms, which have demonstrated acceptable precision and standard error of measurement when compared to the static short-forms and original full-length assessment. This study sought to use synthetic data simulations using the catIrt R package (Nydik, 2014) to investigate possible advantages of the use of tailored provisional ability scores at the start of a CAT PNT. Results revealed no significant improvement in the performance of the test when starting at a tailored provisional ability score. These results further guide next steps in developing more precise computer adaptive tests for assessing anomia and additionally demonstrated the advantages of computer simulations in advancing this line of work.


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