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Assessing Working Memory in Children: The Comprehensive Assessment Battery for Children – Working Memory (CABC-WM)
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Alpha phase-coding supports feature binding during working memory maintenance.

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    Neural phase synchrony enables feature binding in working memory (WM). Swap errors in WM occur due to disruptions in this synchrony, revealing cognitive capacity limits.

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    Area of Science:

    • Cognitive Neuroscience
    • Neuroscience

    Background:

    • Working memory (WM) relies on binding object features into unified representations.
    • The neural mechanisms underlying feature binding and the cause of binding (or swap) errors remain poorly understood.
    • Binding errors in WM highlight cognitive capacity limitations.

    Purpose of the Study:

    • To investigate the role of neural phase synchrony in working memory feature binding.
    • To test if disruptions in neural synchrony cause binding (swap) errors.
    • To elucidate the neural dynamics underlying working memory capacity limits.

    Main Methods:

    • Magnetoencephalography (MEG) was used to record brain activity in human subjects.
    • A task was designed to specifically induce feature binding errors in working memory.
    • Analysis focused on phase-locked oscillatory activity and phase-coding variability during memory retention.

    Main Results:

    • Swap errors in WM were associated with reduced phase-locked oscillatory activity during memory retention.
    • This reduction in synchrony aligns with predictions from attractor models of neural networks.
    • Increased phase-coding variability in the alpha-band over sensorimotor areas characterized binding errors.

    Conclusions:

    • Neural phase synchrony is crucial for feature binding in working memory.
    • Disruptions in phase synchrony, specifically increased alpha-band phase-coding variability, underlie WM swap errors.
    • Feature binding in WM emerges from phase-coding dynamics driven by neural competition.