Department of Psychological Sciences, Birkbeck, University of London, United Kingdom.
Department of Psychological Sciences, Birkbeck, University of London, United Kingdom.
Conscious Cogn. 2018 May;61:107-116. doi: 10.1016/j.concog.2018.01.002. Epub 2018 Jan 17.
Previous studies showed stereotyped distortions in hand representations. People judge their knuckles as farther forward in the hand than they actually are. The cause of this bias remains unclear. We tested whether both visual and tactile information contribute to the bias. In Experiment 1, participants judged the location of their knuckles by pointing to the location on their palm with: (1) a metal baton (using vision and touch), (2) a metal baton while blindfolded (using touch), or (3) a laser pointer (using vision). Distal mislocalisations were found in all conditions. In Experiment 2, we investigated whether judgments are influenced by visual landmarks such as creases. Participants localized their knuckles on either a photograph of their palm or a silhouette. Distal mislocalisations were apparent in both conditions. These results show that distal biases are resistant to changes in stimulus information, suggesting that such mislocalisations reflect a conceptual mis-representation of hand structure.
先前的研究表明，手的表象存在刻板的扭曲。人们判断自己的指关节比实际位置更靠前。造成这种偏差的原因尚不清楚。我们测试了视觉和触觉信息是否都会导致这种偏差。在实验 1 中，参与者通过以下方式用金属棒（同时使用视觉和触觉）、蒙住眼睛的金属棒（仅使用触觉）或激光笔（仅使用视觉）指出他们手的指关节位置：(1) 金属棒（同时使用视觉和触觉），(2) 蒙住眼睛的金属棒（仅使用触觉），或 (3) 激光笔（仅使用视觉）。在所有条件下都发现了远端定位错误。在实验 2 中，我们研究了视觉地标（如折痕）是否会影响判断。参与者在自己手掌的照片或轮廓上定位自己的指关节。在这两种情况下都出现了远端定位错误。这些结果表明，远端偏差不受刺激信息变化的影响，这表明这种定位错误反映了对手结构的概念性错误表示。
