de Poel Harjo J, Peper C Lieke E, Beek Peter J
Research Institute MOVE, Faculty of Human Movement Sciences, VU University Amsterdam, Amsterdam, The Netherlands.
J Exp Psychol Hum Percept Perform. 2009 Jun;35(3):762-77. doi: 10.1037/a0013549.
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.
节律性肢体间协调中的注意力不对称会导致相对相位动力学的不对称，据称这反映了耦合强度的不对称。然而，相对相位不对称也可能由注意力引起的肢体运动幅度（以及相应的偏好频率）差异所导致。作者进行了3项实验来区分这些（并非相互排斥的）潜在影响。对幅度差异和注意力焦点进行单独及联合的控制性操作后发现，幅度差异的变化产生了预期效果，但也提供了证据，反驳了当前流行的一种解释，即注意力不对称通过耦合强度的不对称来影响相对相位动力学。本文结合近期的实证研究结果和现有的动力学模型，对这些发现的意义进行了讨论。
