Evaluating comparative and equality judgments in contrast perception: attention alters appearance.
Evaluating comparative and equality judgments in contrast perception: attention alters appearance.
复制标题
DOI：
10.1167/10.11.6
复制
发表时间：
2010-09-09
影响因子：
1.8
通讯作者：
Carrasco M
中科院分区：
文献类型：
--
作者：
Anton-Erxleben K;Abrams J;Carrasco M
内隐注意不仅可以提高许多视觉任务的表现，而且还可以调节一些视觉特征的出现。关于注意力和外观的研究已经使用基于比较判断的任务来评估主观外观（例如，）。最近，质疑这些结果的有效性，因为他们没有发现一个显着的效果，注意力对比外观使用平等的任务。他们声称，这种平等的判断是无偏见的，而比较的判断是倾向于偏见，并提出了一种替代解释的基础上，决策偏见的先前的研究结果。然而，迄今为止，还没有经验支持平等程序的优越性。在这里，我们比较偏见和敏感性的变化，在感知对比的两种范式。我们测量对比外观使用比较和平等的判断。观察者判断两个同时呈现的刺激的对比度，而一个刺激的对比度是物理递增的（实验1和2）或外源性注意力被吸引到它（实验3和4）。我们展示了平等范式的几个方法上的局限性。然而，这两种范式捕捉PSE的变化，由于物理和感知的变化对比度，并表明，注意力增强明显的对比度。
Covert attention not only improves performance in many visual tasks but also modulates the appearance of several visual features. Studies on attention and appearance have assessed subjective appearance using a task contingent upon a comparative judgment (e.g.,). Recently, questioned the validity of those results because they did not find a significant effect of attention on contrast appearance using an equality task. They claim that such equality judgments are bias-free whereas comparative judgments are bias-prone and propose an alternative interpretation of the previous findings based on a decision bias. However, to date there is no empirical support for the superiority of the equality procedure. Here, we compare biases and sensitivity to shifts in perceived contrast of both paradigms. We measured contrast appearance using both a comparative and an equality judgment. Observers judged the contrasts of two simultaneously presented stimuli, while either the contrast of one stimulus was physically incremented (Experiments 1 and 2) or exogenous attention was drawn to it (Experiments 3 and 4). We demonstrate several methodological limitations of the equality paradigm. Nevertheless, both paradigms capture shifts in PSE due to physical and perceived changes in contrast and show that attention enhances apparent contrast.
登录
查看更多内容
影响因子：
1.8
作者：
Dobkins, KR;Bosworth, RG
通讯作者：
Bosworth, RG
影响因子：
1.8
作者：
Giordano, Anna Marie;McElree, Brian;Carrasco, Marisa
通讯作者：
Carrasco, Marisa
影响因子：
1.8
作者：
Carrasco, M;Penpeci-Talgar, C;Eckstein, M
通讯作者：
Eckstein, M
影响因子：
--
作者：
Cameron, EL;Tai, JC;Carrasco, M
通讯作者：
Carrasco, M
DOI：
10.1364/josaa.4.001606
发表时间：
1987-08-01
影响因子：
1.9
作者：
DAVIS, ET;YAGER, D;JONES, BJ
通讯作者：
JONES, BJ