Krumhansl C L
Perception. 1984;13(5):535-46. doi: 10.1068/p130535.
Rotating or stationary targets were presented simultaneously with a random-dot mask which was itself either rotating or stationary. Observers were required to judge both the form of the target and its motion; these target attributes were manipulated orthogonally in the experiment. The results support the hypothesis that under these conditions figural information is encoded independently from motion information. On a trial-by-trial basis within conditions of target and mask motion combinations, performance in the two tasks was independent. Across conditions, different effects were observed in the two dependent measures. Form judgments were generally more accurate for rotating than for stationary targets, particularly when the mask was stationary. Motion judgments showed frequent intrusions from the motion of the mask, so that most errors occurred when target and mask were dissimilar in terms of their motion. The results show differential interference of the random-dot mask on the encoding of the two independent stimulus attributes, and support the possibility of separate processing of figural and motion information.
旋转或静止的目标与随机点掩蔽同时呈现，随机点掩蔽本身也可以是旋转的或静止的。观察者需要判断目标的形状及其运动；在实验中，这些目标属性是正交操作的。结果支持了这样一种假设，即在这些条件下，图形信息与运动信息是独立编码的。在目标和掩蔽运动组合的条件下，逐次试验中，两项任务的表现是独立的。在不同条件下，在两项相关测量中观察到了不同的效应。形状判断通常对于旋转目标比静止目标更准确，尤其是当掩蔽静止时。运动判断频繁受到掩蔽运动的干扰，因此当目标和掩蔽在运动方面不同时，大多数错误就会发生。结果显示了随机点掩蔽对两个独立刺激属性编码的不同干扰，并支持了图形和运动信息单独处理的可能性。
