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VERSION:2.0
PRODID:-//Memento EPFL//
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SUMMARY:Optimal integration of evidence for decision-making in the rat
DTSTART:20110922T164500
DTSTAMP:20260916T050032Z
UID:b4d731e45f08d48704fd251484c2828181da37c63e9c2cbc7ce42342
CATEGORIES:Miscellaneous
DESCRIPTION:Carlos BRODY\nGradual accumulation of evidence over time is th
 ought to be a fundamental component of decision-making  but the mechanisms
  and properties of the accumulation remain unclear. Although most models a
 ssume a noisy evidence accumulation process  the properties of this noise 
 have never been isolated and measured. We developed a novel decision-makin
 g task that is particularly amenable to quantitative analyses that reveal 
 properties of the decision process. The task allowed us to measure  for th
 e first time  the magnitude of noise in the evidence accumulator process  
 separately from the magnitude of noise in sensory processes. Remarkably  w
 e found that accumulator noise magnitude was zero. In addition  we found t
 hat the accumulator had very long ( ~ 1 sec ) time constants. Our results 
 show that rats have near-optimal graded evidence accumulators  characteriz
 ed by long  noiseless memories.
LOCATION:BC 01 https://plan.epfl.ch/?room==BC%2001
STATUS:CONFIRMED
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