Stimulus expectation alters decision criterion but not sensory signal in perceptual decision making.
Stimulus expectation alters decision criterion but not sensory signal in perceptual decision making.
复制标题
DOI：
10.1038/s41598-017-16885-2
复制
发表时间：
2017-12-06
影响因子：
4.6
通讯作者：
Rahnev D
中科院分区：
文献类型：
--
作者：
Bang JW;Rahnev D
人类更有可能报告感知预期的刺激而不是意外的刺激。有影响力的理论提出，这种偏见源于期望改变了感官信号。然而，期望的影响也可能是由于独立于任何感官变化的决策标准转变造成的。为了在这两种可能性之间做出判断，我们比较了刺激前线索（前线索;可以影响感觉信号和决策过程）和刺激后线索（后线索;只能影响决策过程）的行为效应。受试者判断一系列Gabor贴片的平均方向。令人惊讶的是，我们发现，后线索有更大的影响反应偏差（标准c）比前线索。此外，前和后线索没有不同的刺激灵敏度（d '）或模式的时间或功能处理的影响。事实上，反向相关分析表明，在时间或基于特征的使用信息之间的前和后线索没有差异。总体而言，后线索产生的所有行为调制观察到的结果，前线索。这些研究结果表明，前和后线索通过相同的机制影响决策，并建议刺激预期改变决策标准，但不是感觉信号本身。
Humans are more likely to report perceiving an expected than an unexpected stimulus. Influential theories have proposed that this bias arises from expectation altering the sensory signal. However, the effects of expectation can also be due to decisional criterion shifts independent of any sensory changes. In order to adjudicate between these two possibilities, we compared the behavioral effects of pre-stimulus cues (pre cues; can influence both sensory signal and decision processes) and post-stimulus cues (post cues; can only influence decision processes). Subjects judged the average orientation of a series of Gabor patches. Surprisingly, we found that post cues had a larger effect on response bias (criterion c) than pre cues. Further, pre and post cues did not differ in their effects on stimulus sensitivity (d’) or the pattern of temporal or feature processing. Indeed, reverse correlation analyses showed no difference in the temporal or feature-based use of information between pre and post cues. Overall, post cues produced all of the behavioral modulations observed as a result of pre cues. These findings show that pre and post cues affect the decision through the same mechanisms and suggest that stimulus expectation alters the decision criterion but not the sensory signal itself.
登录
查看更多内容
影响因子：
5.3
作者：
de Lange, Floris P.;Rahnev, Dobromir;Lau, Hakwan
通讯作者：
Lau, Hakwan
影响因子：
5.3
作者：
Kok, Peter;Brouwer, Gijs Joost;de lange, Floris P.
通讯作者：
de lange, Floris P.
影响因子：
3.5
作者：
Balakrishnan, J. D.;MacDonald, Justin A.
通讯作者：
MacDonald, Justin A.
DOI：
10.1098/rstb.2005.1622
发表时间：
2005-04-29
影响因子：
6.3
作者：
Friston, KJ
通讯作者：
Friston, KJ
影响因子：
3.7
作者：
Kok, Peter;Rahnev, Dobromir;de Lange, Floris P.
通讯作者：
de Lange, Floris P.