Aphasia Clinical Trial
Official title:
Inner Speech and Naming Treatment for Individuals With Aphasia
Aphasia is a language disorder, commonly resulting from stroke or other brain injury, that impacts a person's ability to communicate. This project is looking to improve upon current treatment methods for spoken naming in people with aphasia. People with aphasia frequently report being able to successfully say a word in their head, regardless of their ability to say the word out loud. For example, when presented with a picture of a house, they may report being able to think or hear "house" in their head, even if they can't name it out loud. This "little voice" inside one's head is known as inner speech (IS). Previous research suggests that some people with aphasia can re-learn to say words with successful IS (i.e., words they can already say in their heads) easier and faster than words with unsuccessful IS. This study will extend these findings by implementing a comparative treatment study in a larger group of participants with aphasia. The results will help to establish recommendations for speech-language pathologists in choosing treatment stimuli for anomia.
Aphasia, a language disorder commonly acquired through stroke, has chronic negative impacts on communication abilities and quality of life. The specific language deficits associated with aphasia typically vary from person to person, but a universal element of aphasia is anomia, or difficulty with naming and word-finding. It is well-known that individuals with aphasia struggle to convey their ideas through overt speech, but little is known about this population's ability to access and utilize inner speech (IS). IS can be defined in many ways, but one simple definition that is well known to most language users is the mental imagery of having a little voice in one's head. Importantly, individuals with aphasia often endorse a mismatch between this "little voice" (IS) and what they can actually say out loud. In a prior interview-based study, over 75% of individuals with aphasia endorsed the specific experience of being able to say a word in their head despite being unable to say it aloud. Previous research examined whether self-reported "successful IS" (sIS) (i.e., I can say the word in my head and it sounds right) predicted therapy outcomes in two participants. In both participants, self-reported IS predicted whether or not (and how quickly) individual words were successfully re-learned during a paired-associate treatment for anomia, and the effect was visible within just a few treatment sessions. This trial provides preliminary evidence that IS can be leveraged to improve outcomes of naming therapy for individuals with aphasia. This study aims to extend these prior finding by implementing a behavioral treatment for anomia using a single-subject experimental design in a larger group of individuals with aphasia. The investigators predict that items reported as sIS will be more effectively learned during anomia treatment than items that are reported as uIS. Because sIS items are already being retrieved by the individual, one can think of them as being closer to successful spoken output than items that are not able to be retrieved (i.e., those reported as uIS). ;
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