Tas A Caglar, Dodd Michael D, Hollingworth Andrew
University of Iowa, IA, USA.
Vis cogn. 2012 Jan;20(1):29-47. doi: 10.1080/13506285.2011.626466. Epub 2011 Nov 21.
The contribution of surface feature continuity to object-based inhibition of return (IOR) was tested in three experiments. Participants executed a saccade to a previously fixated or unfixated colored disk after the object had moved to a new location. Object-based IOR was observed as lengthened saccade latency to a previously fixated object. The consistency of surface feature (color) and spatiotemporal information was manipulated to examine the feature used to define the persisting objects to which inhibition is assigned. If the two objects traded colors during motion, object-based IOR was reliably reduced (Experiment 2), suggesting a role for surface feature properties in defining the objects of object-based IOR. However, if the two objects changed to new colors during motion, object-based IOR was preserved (Experiment 1), and color consistency was not sufficient to support object continuity across a salient spatiotemporal discontinuity (Experiment 3). These results suggest that surface feature consistency plays a significant role in defining object persistence for the purpose of IOR, although surface features may be weighted less strongly than spatiotemporal features in this domain.
在三个实验中测试了表面特征连续性对基于客体的返回抑制（IOR）的作用。在客体移动到新位置后，参与者向之前注视过或未注视过的彩色圆盘执行一次扫视。基于客体的IOR表现为对之前注视过的客体的扫视潜伏期延长。对表面特征（颜色）和时空信息的一致性进行了操控，以检验用于定义被赋予抑制作用的持续存在客体的特征。如果两个客体在运动过程中交换了颜色，基于客体的IOR会显著降低（实验2），这表明表面特征属性在定义基于客体的IOR的客体时发挥了作用。然而，如果两个客体在运动过程中变为新的颜色，基于客体的IOR则会保留（实验1），并且颜色一致性不足以支持在显著的时空不连续情况下的客体连续性（实验3）。这些结果表明，表面特征一致性在为IOR定义客体持续性方面发挥着重要作用，尽管在这一领域中表面特征的权重可能不如时空特征那么大。
