1] Department of Neurology, RWTH Aachen University, Pauwelsstrasse 30, 52074 Aachen, Germany [2] Institute of Neuroscience and Medicine, Research Centre Jülich GmbH, Wilhelm-Johnen-Strasse, 52428 Jülich, Germany [3].
1] Department of Neurosurgery, University Medical Center Hamburg-Eppendorf, Martinistrasse 52, 20246 Hamburg, Germany [2].
Nat Commun. 2014 Jun 5;5:3940. doi: 10.1038/ncomms4940.
To date the exact neuronal implementation of decision confidence has been subject to little research. Here we explore electroencephalographic correlates of human choice certainty in a visual motion discrimination task for either spatial attention or motor effector cue instructions. We demonstrate electrophysiological correlates of choice certainty that evolve as early as 300 ms after stimulus onset and resemble the primary visual motion representations in early visual cortex. These correlates do not emerge unless or until the subject unambiguously knows which of the competing visual stimuli is actually relevant to behaviour. They extend beyond stimulus presentation up to the motor response but are independent of the motor effector. Our findings suggest that perceptual confidence evolves in parallel with representations of stimulus properties and is dedicated to one specific aspect of the visual world. Its electroencephalographic correlates can be disentangled from representations of sensory evidence, objective discrimination performance and overt motor behaviour.
迄今为止，决策信心的确切神经元实现一直是研究甚少的领域。在这里，我们在一个视觉运动辨别任务中探索了人类选择确定性的脑电图相关物，该任务涉及空间注意或运动效应器线索指令。我们证明了选择确定性的电生理相关物，其早在刺激开始后 300 毫秒就出现，类似于早期视觉皮层中的主要视觉运动表象。除非主体明确知道哪些竞争的视觉刺激实际上与行为相关，否则这些相关物不会出现。它们从刺激呈现扩展到运动反应，但与运动效应器无关。我们的发现表明，知觉信心与刺激属性的表示并行发展，并且专门针对视觉世界的一个特定方面。它的脑电图相关物可以与感觉证据、客观辨别性能和明显的运动行为的表示区分开来。
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