School of Psychological Sciences, The University of Manchester, Manchester M13 9PL, UK.
Brain Cogn. 2010 Jul;73(2):102-9. doi: 10.1016/j.bandc.2010.03.006. Epub 2010 Apr 18.
To investigate attentional shifting in perihand space, we measured performance on a covert visual orienting task under different hand positions. Participants discriminated visual shapes presented on a screen and responded using footpedals placed under their right foot. With the right hand positioned by the right side of the screen, mean cueing effects were significantly greater for targets presented on the right compared to the left side, at the shortest stimulus onset asynchrony. The right hand still affected attention when the left foot was used to respond and when the right hand was crossed over the midline, indicating that this effect is not restricted to the right hemifield and cannot be accounted for by greater stimulus-response compatibility with the right (responding) foot. These experiments provide preliminary evidence that the presence of the right hand can modulate shifts of visual attention but emphasise the importance of stimulus-response compatibility effects in such investigations.
为了研究手中空间的注意转移，我们在不同的手位条件下，测量了被试在隐蔽视觉定向任务中的表现。参与者在屏幕上辨别视觉形状，并使用放在右脚下面的脚踏板做出反应。当右手放在屏幕的右侧时，与最短的刺激呈现时间间隔相比，目标出现在右侧时的提示效应明显更大。当使用左脚做出反应，或者当右手越过中线时，右手仍然会影响注意力，这表明这种效应不仅局限于右半视野，也不能用右手（反应）脚与刺激反应的更大兼容性来解释。这些实验初步证明了右手的存在可以调节视觉注意力的转移，但强调了在这类研究中刺激反应兼容性效应的重要性。
