Disentangling the effects of attentional and amplitude asymmetries on relative phase dynamics

H.J. de Poel, C.E. Peper, P.J. Beek

    Research output: Contribution to JournalArticleAcademicpeer-review


    Attentional asymmetry in rhythmic interlimb coordination induces an asymmetry in relative phase dynamics, allegedly reflecting an asymmetry in coupling strength. However, relative phase asymmetries may also be engendered by an attention-induced difference between the amplitudes (and hence the preferred frequencies) of the limb movements. The authors conducted 3 experiments to dissociate those (not mutually exclusive) potential effects. Controlled manipulations of amplitude disparity and attentional focus, both alone and combined, revealed that variations in amplitude disparity had the expected effects, but produced evidence against the currently prevailing interpretation that attentional asymmetry affects the relative phase dynamics through an asymmetry in coupling strength. Implications of these findings are discussed vis-à-vis recent empirical findings and extant dynamical models. © 2009 American Psychological Association.
    Original languageEnglish
    Pages (from-to)762-777
    JournalJournal of Experimental Psychology: Human Perception and Performance
    Issue number3
    Publication statusPublished - 2009


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