Searching for variegated elements.
Searching for variegated elements.
复制标题
DOI：
10.1167/11.1.12
复制
发表时间：
2011-01
影响因子：
1.8
通讯作者：
P. Monnier;Jenni Gustafson
中科院分区：
文献类型：
--
作者：
P. Monnier;Jenni Gustafson
视觉搜索性能进行了研究，杂色的元素，彼此不同的空间平均色度（相同的色彩对比度;实验1）或色彩对比的杂色（相同的空间平均色度;实验2）。具体而言，搜索性能被测量为噪声对比度的函数，所述噪声对比度沿着沿着相同的颜色方向或与信号（目标）杂色正交地被表达。目标干扰差异阈值估计在两个可选的强迫选择任务与简要介绍显示。首先，当信号和噪声杂色沿颜色空间中的相同方向沿着连接时，与杂色对比度不同的元素相比，空间平均色度彼此不同的元素对噪声不太敏感。第二，正交噪声对阈值的影响很小，支持调解这些搜索的机制之间的独立性。第三，当考虑到不同颜色方向之间和观察者之间的灵敏度差异时，噪声的影响在不同颜色方向以及观察者之间是相似的（但对于两种类型的杂色仍然不同）。最后一个声明之所以成立，是因为颜色空间对每个参与者都进行了规范化。
Visual search performance was investigated for variegated elements that differed from each other either in space-average chromaticity (identical chromatic contrast; Experiment 1) or in the chromatic contrast of the variegation (identical space-average chromaticity; Experiment 2). Specifically, search performance was measured as a function of noise contrast articulated either along the same color direction or orthogonally from the signal (target) variegation. Target-to-distractor difference thresholds were estimated in a two-alternative forced-choice task with briefly presented displays. First, when the signal and noise variegations were articulated along the same direction in color space, elements that differed from each other in space-average chromaticity were less susceptible to noise compared to elements that differed in the contrast of the variegation. Second, orthogonal noise had little effect on threshold supporting independence between the mechanisms mediating these searches. Third, the effect of the noise was similar across the different chromatic directions as well as between observers (but still differed for the two types of variegation) when differences in sensitivity between the various color directions and between observers were taken into account. This last statement only holds because the color space was normalized for each participant.