LaGasse L L
University of Massachusetts, Amherst.
Percept Psychophys. 1993 Jan;53(1):89-105. doi: 10.3758/bf03211718.
Does the global precedence effect depend on the goodness of the global form and low spatial frequencies? In Experiments 1 and 2, under a variety of attentional and task conditions, a global advantage in response time (RT) occurred in "good," many-element compound patterns but not in "poor," few-element patterns (unless the local elements were too small to be easily recognized). Symmetric interference effects were found in all patterns, however, suggesting that global and local information were encoded in parallel and that the global advantage in RT involved some postperceptual processes. Experiments 3A and 3B showed that the global advantage in RT and perceived pattern goodness depend on low spatial frequencies: Lowpass-filtered patterns rated as "good" showed the usual global advantage in RT, but highpass-filtered, many-element forms rated as "poor" did not. These findings suggest that a global advantage in RT requires an unambiguous global form conveyed by low spatial frequencies.
全局优先效应是否取决于全局形式的优劣以及低空间频率？在实验1和实验2中，在各种注意力和任务条件下，反应时间（RT）上的全局优势出现在“优”的、由多个元素组成的复合图案中，而在“差”的、由较少元素组成的图案中则未出现（除非局部元素太小而难以轻易识别）。然而，在所有图案中都发现了对称干扰效应，这表明全局和局部信息是并行编码的，并且反应时间上的全局优势涉及一些知觉后加工过程。实验3A和3B表明，反应时间上的全局优势以及感知到的图案优劣取决于低空间频率：被评为“优”的低通滤波图案在反应时间上表现出通常的全局优势，但被评为“差”的高通滤波的、由多个元素组成的形式则没有。这些发现表明，反应时间上的全局优势需要由低空间频率传达的明确全局形式。
