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Fast Periodic Visual Stimulation indexes preserved semantic memory in healthy ageing
Alex Milton1, Alesi Rowland2, George Stothart3
1School of Psychological Science, University of Bristol, Bristol, BS8 1TU, UK. a.milton@bristol.ac.uk.
Scientific Reports
|August 6, 2020
Summary
Healthy aging preserves semantic memory, even when using non-linguistic tasks. This study used fast periodic visual stimulation (FPVS) with EEG to show older adults can automatically categorize images, similar to younger adults.
Area of Science:
- Neuroscience
- Cognitive Psychology
Background:
- Mixed findings exist regarding semantic memory preservation in healthy aging.
- Lexical access to semantic knowledge might be age-sensitive, necessitating non-linguistic assessment methods.
Purpose of the Study:
- To assess semantic memory in younger and older adults using a non-linguistic task.
- To investigate automatic semantic categorization abilities unaffected by linguistic strategies.
Main Methods:
- Employed a fast periodic visual stimulation (FPVS) paradigm with electroencephalography (EEG).
- Presented rapid streams of images from distinct semantic categories to assess automatic categorization.
- Utilized mobile EEG equipment for potential real-world applicability.
Main Results:
- Both younger and older adults demonstrated successful and comparable semantic categorization.
- Individual-level categorization was achieved by 71% of older and 72% of younger adults.
- High detection rates suggest automatic processing, independent of explicit linguistic strategies.
Conclusions:
- Semantic memory appears to be maintained in healthy aging, as evidenced by automatic image categorization.
- The FPVS-EEG paradigm is a viable, non-linguistic method for assessing semantic memory across age groups.
- The study's methodology is suitable for practical applications beyond traditional research settings.
