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Related Experiment Video

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Combined Shuttle-Box Training with Electrophysiological Cortex Recording and Stimulation as a Tool to Study Perception and Learning
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Alpha-band EEG activity in perceptual learning.

Brett C Bays, Kristina M Visscher, Christophe C Le Dantec

    Journal of Vision
    |September 16, 2015
    PubMed
    Summary

    Perceptual learning (PL) enhances task automaticity, as shown by changes in alpha-band activity during visual attention tasks. These neural changes, measured via electroencephalogram (EEG), suggest more efficient resource allocation after training.

    Area of Science:

    • Neuroscience
    • Cognitive Psychology
    • Perceptual Learning

    Background:

    • Perceptual learning (PL) involves extensive training to improve task performance.
    • The neural mechanisms driving PL, particularly brain plasticity, are under investigation.
    • Task automaticity is a proposed outcome of PL, especially with trained stimuli.

    Purpose of the Study:

    • To test the hypothesis that PL enhances task automaticity.
    • To examine alpha-band activity as a neural correlate of automaticity in PL.
    • To investigate whether changes in alpha-band activity are specific to trained stimuli.

    Main Methods:

    • Participants underwent eight training sessions on a visual search task.
    • Electroencephalogram (EEG) recorded alpha-band activity before and after training.

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  • Alpha-band activity was analyzed during stimulus presentation for trained and untrained stimuli.

    • Main Results:

    • Significant improvements in task performance (threshold, accuracy, reaction time) were observed.
    • Post-training, alpha power increased pre-stimulus and desynchronized more at stimulus onset.
    • These alpha-band changes occurred similarly for both trained and untrained stimuli.

    Conclusions:

    • Findings support increased efficiency in resource allocation at stimulus presentation.
    • The results suggest enhanced automaticity of task performance following perceptual learning.
    • Transfer effects in PL may depend on individual differences in stimulus processing effort.