Kerzel Dirk, Gegenfurtner Karl R
Justus-Liebig-Universität Giessen, FB 06 Psychologie und Sportwissenschaft, Otto-Behaghel-Strasse 10F, 35394 Giessen, Germany.
Vision Res. 2004 Mar;44(6):577-90. doi: 10.1016/j.visres.2003.10.011.
In the Fröhlich illusion, the first position of a moving target is mis-localized in the direction of motion. In the onset repulsion effect, the opposite error occurs. To reconcile these conflicting error patterns, we improved previous methods by using natural pointing movements and a large range of target velocities. Displacement was found to increase in the direction of motion, but the linear function relating velocity and displacement was shifted opposite to the direction of target motion. The results suggest that onset localization may be determined by two independent factors: first, an (attentional) delay that accounts for the increase of displacement in the direction of motion with increasing velocity. This delay is visible in motor and probe judgments and explains the Fröhlich illusion. Second, motor judgments are offset opposite to the direction of target motion. This bias is unique to motor judgments (pointing) and may be partially explained by attentional repulsion.
在弗勒利希错觉中，移动目标的初始位置在运动方向上被错误定位。在起始排斥效应中，则会出现相反的误差。为了协调这些相互矛盾的误差模式，我们通过使用自然指向运动和大范围的目标速度改进了先前的方法。结果发现位移在运动方向上增加，但将速度和位移联系起来的线性函数向与目标运动方向相反的方向偏移。结果表明，起始定位可能由两个独立因素决定：第一，一种（注意力）延迟，它解释了随着速度增加位移在运动方向上的增加。这种延迟在运动和探测判断中都很明显，并解释了弗勒利希错觉。第二，运动判断向与目标运动方向相反的方向偏移。这种偏差是运动判断（指向）所特有的，可能部分由注意力排斥来解释。
