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Visual Attention to Semantic and Orthographic Associations in Fluent Aphasia: Evidence from Eye-Tracking.
Susan M DeMetropolis1, Andrea Pittarello2
1Department of Speech-Language-Hearing Sciences, Hofstra University, Hempstead, NY, USA.
Perceptual and Motor Skills
|April 22, 2024
Summary
Neurotypical individuals and people with aphasia (PWA) show differences in visual attention during association tasks. Semantic associations are important for PWA, suggesting a potential speech therapy approach.
Area of Science:
- Cognitive Neuroscience
- Psycholinguistics
- Speech and Language Pathology
Background:
- Understanding visual attention allocation is crucial for cognitive processing.
- Fluent aphasia, a language disorder post-stroke, can impact cognitive functions.
- Association tasks reveal how the brain links concepts.
Purpose of the Study:
- To investigate visual attention patterns in neurotypicals versus adults with fluent aphasia.
- To compare how semantic and orthographic associations influence attention.
- To explore potential speech and language therapy applications.
Main Methods:
- Utilized an eye-tracking paradigm to monitor participants' gaze.
- Presented participants with pictures and subsequent semantic/orthographic associations.
- Recorded eye movements across defined areas of interest (picture, semantic, orthographic associates).
Main Results:
- Both groups fixated longer on semantic associates than pictures, more so in neurotypicals.
- Neurotypicals also fixated longer on orthographic associates than pictures compared to PWA.
- Higher frequency of fixations on semantic associates observed in both groups, notably stronger in neurotypicals.
Conclusions:
- Semantic associations play a significant role in the cognitive processing of individuals with fluent aphasia.
- Attention allocation differences highlight unique processing strategies in PWA.
- Findings support the development of semantic-based interventions in speech and language therapy for aphasia.
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