Exploring Category Change Neural Responses Using Semantically Similar Stimuli With Fast Periodic Visual Stimulation
Murphy, Z.; Vandenheever, D.
Show abstract
Fast periodic visual stimulation (FPVS) has recently demonstrated an ability to index multiple cognitive domains such as facial expression processing, working memory, and more recently, semantic categorization in just a few minutes of recording time. The present work investigates the effects of low semantic distance and how this modulates semantic categorization responses. Twenty-seven healthy young adults completed an FPVS oddball paradigm in order to determine whether comparing fruits and vegetables of the same color would elicit semantic categorization responses. Strong oddball responses were observed up to the 10th frequency harmonic, and responses showed statistically significant right occipito-temporal lateralization that was not present in a low-level color change condition completed by participants and is opposite the pattern observed in recent word-based semantic categorization FPVS studies. The findings suggest that image-based FPVS paradigms should be investigated further as candidate tools to study conditions that affect semantic categorization such as Alzheimers disease.
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