Badcock D R, Hess R F, Dobbins K
Department of Ophthalmology, McGill University, Montreal, Quebec, Canada.
Vision Res. 1996 May;36(10):1467-72. doi: 10.1016/0042-6989(95)00205-7.
The visual system commonly has to estimate the relative location of a textured region but the stimulus features used to perform that task are yet to be determined. The use of centroid, midpoint and peak activity cues would all be reasonable. In the current experiment an attempt was made to assess the relative efficacy of these three cues. The observers were required to indicate whether a cloud of either 3, 10 or 100 elements was located to the left or right of an imaginary line formed between two reference elements. Performance was compared to that expected from the use of the three cues. It was concluded that the cue used varied as the characteristics of the cloud changed and therefore that the visual system is not restricted to the use of a single cue type when localizing object clusters.
视觉系统通常需要估计有纹理区域的相对位置，但用于执行该任务的刺激特征尚未确定。使用质心、中点和峰值活动线索都是合理的。在当前实验中，人们试图评估这三种线索的相对有效性。要求观察者指出由3个、10个或100个元素组成的云团是位于在两个参考元素之间形成的假想线的左侧还是右侧。将表现与使用这三种线索时预期的表现进行比较。得出的结论是，所使用的线索会随着云团特征的变化而变化，因此在定位对象集群时，视觉系统并不局限于使用单一类型的线索。
