Multisensory decision-making in rats and humans.
Multisensory decision-making in rats and humans.
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DOI：
10.1523/jneurosci.4998-11.2012
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发表时间：
2012-03-14
期刊：
影响因子：
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通讯作者：
Churchland AK
中科院分区：
文献类型：
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作者：
Raposo D;Sheppard JP;Schrater PR;Churchland AK
我们报告了一个新的多感官决策任务，旨在鼓励受试者结合联合收割机的信息跨越时间和感官形式。我们提出的主题，人类和大鼠，多感官事件流，包括一系列简短的听觉和/或视觉事件。受试者判断这些流的事件发生率是高还是低。我们有三个主要发现：首先，我们报告说，随着时间的推移，受试者可以联合收割机多感官信息，以提高对波动率是高还是低的判断。重要的是，我们观察到的改善经常接近或优于统计学上的最佳预测。第二，我们发现，受试者表现出明显的多感官增强时，在每一个模态的输入是多余的，也当他们提供独立的证据率。这后一个发现表明，一个模型中的事件发生率分别估计为每一个模态和融合在稍后的阶段。最后，由于在人类和大鼠中观察到类似的多感官增强，我们得出结论，最佳利用顺序呈现的多感官信息的能力并不局限于特定物种。
We report a novel multisensory decision task designed to encourage subjects to combine information across both time and sensory modalities. We presented subjects, humans and rats, with multisensory event streams, consisting of a series of brief auditory and/or visual events. Subjects made judgments about whether the event rate of these streams was high or low. We have three main findings: First, we report that subjects can combine multisensory information over time to improve judgments about whether a fluctuating rate is high or low. Importantly, the improvement we observed was frequently close to, or better than, the statistically optimal prediction. Second, we found that subjects showed a clear multisensory enhancement both when the inputs in each modality were redundant and also when they provided independent evidence about the rate. This latter finding suggests a model where event rates are estimated separately for each modality and fused at a later stage. Finally, because a similar multisensory enhancement was observed in both humans and rats, we conclude that the ability to optimally exploit sequentially presented multisensory information is not restricted to a particular species.