文献类型：期刊文献

英文题名：Top-down modulation on depth processing: Visual searches for metric and ordinal depth information show a pattern of dissociation

作者：Zhang, Ke[1,2];Qian, Jiehui[1]

机构：[1]Sun Yat Sen Univ, Dept Psychol, Guangzhou 510006, Peoples R China;[2]Shaoxing Univ, Dept Psychol, Shaoxing, Peoples R China

年份：0

外文期刊名：PSYCHONOMIC BULLETIN & REVIEW

收录：SSCI(收录号：WOS:000898327200001)、、Scopus(收录号：2-s2.0-85143782564)、WOS

基金：AcknowledgementsThis research was supported by the National Natural Science Foundation of China (32271100), the Guangdong Basic and Applied Basic Research Foundation (2021A1515010840), and the Fundamental Research Funds for the Central Universities (20wkzd12). The authors have no competing financial interests that might be perceived to influence the results and/or discussion reported in this paper.

语种：英文

外文关键词：Depth perception; Top-down modulation; Visual search; Metric vs; ordinal

外文摘要：Depending on the goal, one can selectively process the metric depth or the ordinal depth information in the same scene. It is unknown whether the metric depth and ordinal depth information are processed through a shared or different underlying mechanisms. Here, we investigated the processing of the metric depth and ordinal depth using visual search. Items were presented at multiple depth planes defined by the binocular disparity, with one item per depth plane. In the metric-search task, participants were required to search for the target on a particular depth plane, among one to three distractors. In the ordinal-search task, the target was specified by its depth order indicated by numbers (smaller numbers indicated nearer depth planes). We found that the ordinal search was faster and more accurate than the metric search, and the data showed a pattern of dissociation. Metric search, but not ordinal search, was slowed when the target and distractors were closer in depth, while ordinal search was slower for the middle than the edge positions but metric search was unaffected. These two opposite effects suggest that metric depth and ordinal depth may be processed differently.