Object,detection and basic-level categorization: Sometimes you know it is there before you know what it is
Object,detection and basic-level categorization: Sometimes you know it is there before you know what it is
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DOI：
10.3758/pbr.15.1.28
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发表时间：
2008-02-01
影响因子：
3.5
通讯作者：
Palmeri, Thomas J.
中科院分区：
文献类型：
--
作者：
Mack, Michael L.;Gauthier, Isabel;Palmeri, Thomas J.
对象检测之间的紧密时间耦合（是否存在对象？）和对象分类（它是什么类型的对象？）最近有报道（Grill-Spector & Kanwisher，2005），表明图像分割成不同的对象和在基本水平上对这些对象进行分类可能是非常相同的机制。在目前的工作中，我们解耦的时间过程中的检测和分类，通过两个任务操作。首先，在一系列图像呈现持续时间内，倒置对象的分类准确性明显低于直立对象，但未观察到对对象检测的显著影响。第二，系统地降低刺激影响分类显着超过对象检测。可以选择性地操纵对象检测和对象分类的时间过程。它们没有内在的联系。一旦你知道一个物体在那里，你不一定知道它是什么。
A tight temporal coupling between object detection (is an object there?) and object categorization (what kind of object is it?) has recently been reported (Grill-Spector & Kanwisher, 2005), suggesting that image segmentation into different objects and categorization of those objects at the basic level may be the very same mechanism. In the present work, we decoupled the time course of detection and categorization through two task manipulations. First, inverted objects were categorized significantly less accurately than upright objects across a range of image presentation durations, but no significant effect on object detection was observed. Second, systematically degrading stimuli affected categorization significantly more than object detection. The time course of object detection and object categorization can be selectively manipulated. They are not intrinsically linked. As soon as you know an object is there, you do not necessarily know what it is.