由双眼立体视觉所引发的目标与掩蔽刺激之间的主观深度分离对视觉索搜的影响作用
其他题名The Effect of the Stereoscopically Perceptual Depth Separation between Targets and Maskers on Visual Search
高雅玥; 李量
2016
会议名称2016年第一届北京视觉科学会议
会议日期2016-07
会议地点北京
会议主办者中国科学院心理研究所
其他摘要

PURPOSE: A visual search for targets is facilitated when the target objects are on a di?erent depth plane than other masking objects cluttering the scene.
METHODS: The ability of observers to determine whether four letters, presented stereoscopically at four symmetrically-located positions on the fixation plane, were the same or di?erent, was assessed when the target letters were masked by other randomly positioned and oriented letters appearing on the same depth plane as the target letters, or in front, or behind it. Three additional control maskers, derived from the letter maskers, were also presented on the same three depth planes: 1) random-phase maskers (same spectral amplitude composition as the letter masker but with the phase spectrum randomized); 2) random-pixel maskers (the locations of the letter maskers’ pixel amplitudes were randomized); and 3) letter-fragment maskers (the same letters as in the letter masker but broken up into fragments).
RESULTS: Performance improved with target duration when the target-letter plane was in front of the letter-masker plane, but not when the target letters were on the same plane as the masker, or behind it. A comparison of the results for the four di?erent kinds of maskers indicated that maskers consisting of recognizable objects (letters or letter fragments) interfere more with search and comparison judgments than visual noise have the same spatial frequency profile and contrast. In addition, performance was poorer for letter maskers than for letter-masker fragments, suggesting that the letter maskers interfered more with performance than the letter-fragment maskers because of the lexical activity they elicit.
CONCLUSIONS: The degree of binocular unmasking is greater when the target appears to be in front of rather than behind the masker in the letter discrimination task. These results contrast with those that indicate that when the target is presented foveally (at the point of fixation) its detectability appears to be independent of whether it is perceived in front of or behind the masker. Hence pattern recognition but not target detection is sensitive to the perceived spatial relationships of maskers to targets. The fact that similar results were obtained for meaningful (whole letters) as for meaningless (letter fragments) maskers indicates that the interference from the masker occurs at a pre-lexical stage of processing.

关键词visual unmasking depth visual information masking disparity
学科领域感知觉心理学
URL查看原文
收录类别其他
语种英语
文献类型会议论文
条目标识符http://ir.psych.ac.cn/handle/311026/20872
专题心理所主办学术会议_2016年第一届北京视觉科学会议_会议摘要
作者单位北京大学 心理学系及北京市行为与精神健康重点实验室 邮编100080
推荐引用方式
GB/T 7714
高雅玥,李量. 由双眼立体视觉所引发的目标与掩蔽刺激之间的主观深度分离对视觉索搜的影响作用[C]. 见:2016年第一届北京视觉科学会议. 北京. 2016-07.http://vision.csp.escience.cn/dct/page/1.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[高雅玥]的文章
[李量]的文章
百度学术
百度学术中相似的文章
[高雅玥]的文章
[李量]的文章
必应学术
必应学术中相似的文章
[高雅玥]的文章
[李量]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。