The Mixture of Bernoulli Experts: a theory to quantify reliance on cues in dichotomous perceptual decisions.
The Mixture of Bernoulli Experts: a theory to quantify reliance on cues in dichotomous perceptual decisions.
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DOI：
10.1167/9.1.6
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发表时间：
2009-01-12
影响因子：
1.8
通讯作者：
Backus BT
中科院分区：
文献类型：
--
作者：
Backus BT
根据定义，感知刺激的外观可以自信地报告，因此这些刺激可能有助于研究视觉线索如何学习和组合以构建视觉外观。然而，解释实验数据（以一种方式或另一种方式观察试验的百分比）需要一个理论上有动机的线索有效性测量。在这里，我们描述了一个简单的贝叶斯理论二分法的知觉决策：混合伯努利专家或MBE。在该理论中，线索的主观可靠性是权重和对线索生态有效性的估计的乘积。该理论（1）证明使用概率单位分析来衡量系统对线索的依赖性是合理的，（2）使假设检验成为可能。为了说明，我们使用明显的3D旋转方向在感知模糊的内克尔立方体电影，以测试视觉系统是否依赖于一个新招募的线索（刺激在视野内的位置），以相同的程度时，长期信任的线索（双眼视差）存在或不存在于显示器。对于六个学员，依赖于新招募的线索是相似的，是否长期信任的线索存在，这表明视觉系统假设新的线索是有条件的独立。
The appearances of perceptually bistable stimuli can by definition be reported with confidence, so these stimuli may be useful to investigate how visual cues are learned and combined to construct visual appearance. However, interpreting experimental data (percent of trials seen one way or the other) requires a theoretically motivated measure of cue effectiveness. Here we describe a simple Bayesian theory for dichotomous perceptual decisions: the Mixture of Bernoulli Experts or MBE. In this theory, a cue’s subjective reliability is the product of a weight and an estimate of the cue’s ecological validity. The theory (1) justifies the use of probit analysis to measure the system’s reliance on a cue and (2) enables hypothesis testing. To illustrate, we used apparent 3D rotation direction in perceptually ambiguous Necker cube movies to test whether the visual system relied on a newly recruited cue (position of the stimulus within the visual field) to the same extent when a long-trusted cue (binocular disparity) was present or not present in the display. For six trainees, reliance on the newly recruited cue was similar whether or not the long-trusted cue was present, suggesting that the visual system assumed the new cue to be conditionally independent.
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影响因子：
3
作者：
ATTNEAVE, F
通讯作者：
ATTNEAVE, F
影响因子：
1.8
作者：
DOSHER, BA;SPERLING, G;WURST, SA
通讯作者：
WURST, SA
影响因子：
1.8
作者：
Geisler, WS;Perry, JS;Gallogly, DP
通讯作者：
Gallogly, DP
影响因子：
1.1
作者：
Foster, DP;Vohra, R
通讯作者：
Vohra, R
影响因子：
5.3
作者：
Dodd, JV;Krug, K;Parker, AJ
通讯作者：
Parker, AJ