Georgiades M S, Harris J P
Department of Psychology, University of Reading, Whiteknights, Reading RG6 6AL, Berks, UK.
Perception. 2000;29(10):1185-201. doi: 10.1068/p3023.
The spatial spread of attentional modulation of selective adaptation was investigated in four experiments in which the duration of the movement aftereffect (MAE) was measured with and without processing of intermittently changing digits at the fixation point. In the first experiment, the effects of diverting attention on MAE duration were found to reduce as the distance between the fixation digits and the inner edge of the surrounding adapt/test grating was increased. A second experiment suggested that eye movements were unlikely to underlie the attentional effects. In experiment 3, the attentional effect stayed constant as the outer diameter of the adapt/test gratings was increased. In experiment 4 (as in experiment 1) the modulatory effects of attention were larger the closer the adapt/test gratings were to the locus of attention, when the area of the grating was held constant but its eccentricity varied. In experiments 1 and 4, an intermittently changing fixation digit was found to reduce MAE durations more than an unchanging digit, even when subjects were not required to process it, suggesting that exogenous as well as endogenous attentional processes modulate early motion processing.
在四项实验中研究了选择性适应的注意力调制的空间传播，在这些实验中，测量了注视点有无间歇变化数字处理时运动后效（MAE）的持续时间。在第一个实验中，发现随着注视数字与周围适应/测试光栅内边缘之间的距离增加，转移注意力对MAE持续时间的影响会减小。第二个实验表明，眼球运动不太可能是注意力效应的基础。在实验3中，随着适应/测试光栅外径的增加，注意力效应保持不变。在实验4中（与实验1一样），当光栅面积保持不变但偏心率变化时，适应/测试光栅离注意力焦点越近，注意力的调制效应就越大。在实验1和4中，发现即使受试者不需要处理，间歇变化的注视数字比不变数字更能缩短MAE持续时间，这表明外源性和内源性注意力过程都会调制早期运动处理。
