Feria Cary S
Department of Psychology, One Washington Square, San Jose State University, San Jose, CA 95192-0120, USA.
Perception. 2012;41(3):287-304. doi: 10.1068/p7053.
Is the effect of distractors in multiple object tracking dependent on the distractors sharing the features of the targets? In experiment 1, observers tracked five targets among five distractors that were identical to the targets and a number of additional distractors that were either identical to or featurally distinct from the targets. Results showed that distractors that are distinct from the targets in shape or color, or are stationary, impair tracking less than distractors that are identical to the targets. However, tracking performance declined as the number of distractors increased, even for featurally distinct distractors. Experiment 2 showed that distractors that differ from the targets on two features impair tracking less than distractors that differ from the targets on only one feature, but only when target tracking load is low. These results indicate that shape, color, and motion information about distractors can be used to distinguish them from targets during tracking, although even distractors with a different feature from the targets produce some interference with tracking. These findings suggest that the effect of distractors on tracking is dependent on top-down settings for target features.
多目标跟踪中干扰项的影响是否取决于干扰项与目标具有相同的特征？在实验1中，观察者在五个与目标相同的干扰项以及一些与目标形状相同或特征不同的额外干扰项中追踪五个目标。结果表明，在形状或颜色上与目标不同的干扰项，或者静止的干扰项，对跟踪的干扰小于与目标相同的干扰项。然而，即使是特征不同的干扰项，随着干扰项数量的增加，跟踪性能也会下降。实验2表明，在两个特征上与目标不同的干扰项对跟踪的干扰小于仅在一个特征上与目标不同的干扰项，但这仅在目标跟踪负荷较低时才成立。这些结果表明，在跟踪过程中，关于干扰项的形状、颜色和运动信息可用于将它们与目标区分开来，尽管即使是与目标特征不同的干扰项也会对跟踪产生一些干扰。这些发现表明，干扰项对跟踪的影响取决于目标特征的自上而下设置。
