Date of Award

Spring 2022

Project Type


Program or Major

Communication Sciences and Disorders

Degree Name

Master of Science

First Advisor

Amy E Ramage

Second Advisor

Donald A Robin

Third Advisor

Kathryn Greenslade


Aphasia is a neurogenic communication disorder that occurs following a left hemisphere stroke and commonly co-occurs with apraxia of speech (AOS). Individuals with aphasia typically make errors in their lexical retrieval and have difficulties detecting and correcting them. While there is ample research in how errors occur, few researchers go as far as to look at error detection and subsequent correction in this population. Given this need for research, we took a pre-existing data set of 23 individuals with aphasia grouped for presence of AOS (nine with comorbid AOS) and coded their spoken responses on the Object Naming subtest of the Western Aphasia Battery-Revised to characterize the types of error made, as well as whether those errors were detected and corrected. Groups did not differ for total number of errors; however, participants with AOS produced more late-stage errors than the participants without AOS, meaning they made errors that occurred after the level of lemma selection (i.e., phonemic paraphasias and neologisms). In this sample, people with aphasia were generally able to detect their errors, though the presence of AOS impacted their ability to correct.