Decoding the Temporal Dynamics of Covert Spatial Attention Using Multivariate EEG Analysis: Contributions of Raw Amplitude and Alpha Power

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Desantis, A; Chan-Hon-Tong, A; Collins, T; Hogendoorn, H; Cavanagh, PDate
2020-10-09Source Title
Frontiers in Human NeurosciencePublisher
FRONTIERS MEDIA SAUniversity of Melbourne Author/s
Hogendoorn, JacobAffiliation
Melbourne School of Psychological SciencesMetadata
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Desantis, A., Chan-Hon-Tong, A., Collins, T., Hogendoorn, H. & Cavanagh, P. (2020). Decoding the Temporal Dynamics of Covert Spatial Attention Using Multivariate EEG Analysis: Contributions of Raw Amplitude and Alpha Power. FRONTIERS IN HUMAN NEUROSCIENCE, 14, https://doi.org/10.3389/fnhum.2020.570419.Access Status
Open AccessAbstract
Attention can be oriented in space covertly without the need of eye movements. We used multivariate pattern classification analyses (MVPA) to investigate whether the time course of the deployment of covert spatial attention leading up to the observer's perceptual decision can be decoded from both EEG alpha power and raw activity traces. Decoding attention from these signals can help determine whether raw EEG signals and alpha power reflect the same or distinct features of attentional selection. Using a classical cueing task, we showed that the orientation of covert spatial attention can be decoded by both signals. However, raw activity and alpha power may reflect different features of spatial attention, with alpha power more associated with the orientation of covert attention in space and raw activity with the influence of attention on perceptual processes.
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