Perceptual decision making in less than 30 milliseconds
By Terrence R. Stanford, S. Shankar, Dino P. Massoglia, M. Costello, Emilio Salinas. 2010
218 citations recorded by the source corpus.
In perceptual discrimination tasks, a subject's response time is determined by both sensory and motor processes. Measuring the time consumed by the perceptual evaluation step alone is therefore complicated by factors such as motor preparation, task difficulty and speed-accuracy tradeoffs. Here we present a task design that minimizes these confounding factors and allows us to track a subject's perceptual performance with unprecedented temporal resolution. We find that monkeys can make accurate color discriminations in less than 30 ms. Furthermore, our simple task design provides a tool for elucidating how neuronal activity relates to sensory as opposed to motor processing, as demonstrated with neural data from cortical oculomotor neurons. In these cells, perceptual information acts by accelerating and decelerating the ongoing motor plans associated with correct and incorrect choices, as predicted by a race-to-threshold model, and the time course of these neural events parallels the time course of the subject's choice accuracy.
Subfields: Cellular and Molecular Neuroscience, Cognitive Neuroscience
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In Cellular and Molecular Neuroscience
In Cognitive Neuroscience
Citations in the corpus
- Attention, learning and the value of information (2012, background): “The oculomotor component of an attentional response is generated by a network of cortical and subcortical structures that includes portions of the basal ganglia, the superior colliculus, and the frontal eye field (Schall et al., 2011; Stanford et al., 2010).”