Speech-Language Pathology (SLP)
Rangos School of Health Sciences
Kathryn L. Garrett
AAC, aphasia, qualitative analysis
A multiple single-subject randomized design experimental study measured the perceptions of three persons with aphasia and their communication partners without aphasia when communicating across three conditions: Condition A--speech generating device (SGD) with No Display; Condition B--SGD with visual scene display (VSD); and Condition C--SGD with traditional grid display (TGD). Quantitative data were collected in the forms of preference choice of display type, a forced-choice ranking of experimental sessions, and 7-pt Likert rating scales. All participants rated the dependent variables of communicative success, ease, independence, and naturalness across conditions. Qualitative data were collected in the form of open-ended interviews conducted at the end of each experimental session and at the close of the study. Each participant dyad completed six experimental sessions consisting of a conversational interaction in which the person with aphasia shared a personally relevant story. Quantitative analyses revealed that 2 of 3 persons with aphasia preferred Condition B (VSD) over the other experimental conditions. All three persons with aphasia chose sessions using VSD as their "best" or top-ranked sessions in the forced-choice ranking task. Qualitative analysis revealed that peer communication partners and participants with aphasia had both favorable perceptions and criticism of the VSD.
Figley, L. (2007). Perceptual Differences in the Conversational Performance of People with Severe Expressive Aphasia Using Three Types of Visual Screen Displays on Speech Generating Devices (Master's thesis, Duquesne University). Retrieved from https://dsc.duq.edu/etd/538