Abstract
Visual Discrimination Accuracy across Reaction Time in Rats
Highlights
Processing time, computational load, and stimulus strength interact in perceptual decisions
Examining discrimination of coherent motion in random dot arrays, it was reported that factors affecting accuracy across reaction time (RT) include processing efficiency and strength of neural representations, (Palmer et al, 2005), as well as mechanisms associated with perceptual decision (Kiani & Shadlen, 2009)
Response frequency peaked between approximately 130 329 ms, followed by a progressive decline, where few responses occurred at the longest RT
Summary
Processing time, computational load, and stimulus strength interact in perceptual decisions. Studies with non-human primates and rodents have demonstrated that perceptual decisions are guided by stimulus processing as well as cognitive factors, such as decision confidence For both olfactory and visual discrimination, mice and rats demonstrate a trade-off between accuracy and speed, which is mediated by the level of difficulty and amount of sampling time. Examining discrimination of coherent motion in random dot arrays, it was reported that factors affecting accuracy across RT include processing efficiency and strength of neural representations, (Palmer et al, 2005), as well as mechanisms associated with perceptual decision (Kiani & Shadlen, 2009). As such, increased percentage of coherent motion produced an increase in accuracy and a decrease in RT Such factors are related to stimulus strength as well as computational load placed on stimulus processing. Examining neural correlates of decision confidence in monkeys (Kiani & Shadlen, 2009) and rats (Kepecs et al, 2008), increased neural response accompanied increased levels of confidence, providing physiological evidence linking confidence to choice decision
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