Psychology Department, University of Turin, Via Po 14, 10123 Turin, Italy.
Exp Brain Res. 2010 Jan;200(1):61-6. doi: 10.1007/s00221-009-1954-7. Epub 2009 Jul 30.
The rightward spatial bias shown by left neglect patients and the small leftward bias displayed by healthy subjects (pseudoneglect) have been interpreted as phenomena sharing a common attentional imbalance mechanism. Here we investigated whether pseudoneglect, similarly as neglect, can occur in an object-centred frame of reference. Thirty healthy participants repeatedly bisected the elongated caricature of a basset hound with the head on the left and the tail on the right or viceversa. In the last critical trials, the figure appeared horizontally mirrored. The bisection error reversed from the left to the right space in the critical trials. This result shows that it is possible to induce object-centred pseudoneglect on newly established knowledge about the canonical orientation of non-verbal visual stimuli.
左忽视患者表现出的右侧空间偏向和健康受试者表现出的轻微左侧偏向（假性忽视）被解释为具有共同注意力失衡机制的现象。在这里，我们研究了假性忽视是否也可以像忽视一样出现在以物体为中心的参照系中。三十名健康参与者反复将一个头部在左侧、尾部在右侧的长变形短腿猎犬卡通形象或反之进行二等分。在最后关键的试验中，图形以水平镜像的形式出现。在关键试验中，二分误差从左侧空间反转到右侧空间。这一结果表明，有可能在新建立的关于非言语视觉刺激的规范方向的知识的基础上，诱导出以物体为中心的假性忽视。
