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Definition
A decision-making threshold is the value of the decision-making variable at which the decision is made, such that an action is selected or a commitment to one alternative is made, marking the end of accumulation of information.
Detailed Description
A decision-making threshold determines when a decision-making process is completed. It represents a value of the decision variable, which in practice could be a linear combination of a set of neural firing rates, at which the accumulation of sensory evidence terminates and a response or action is chosen. In two-alternative forced-choice tasks, two thresholds exist, one for each of the two alternatives.
In models of decision making, the threshold can be either static or dynamic during an individual trial. Mathematically, a threshold is an absorbing boundary of the diffusion process for the decision variable. The time for the decision variable to reach such an absorbing boundary...
References
Bogacz R, Brown E, Moehlis J, Holmes P, Cohen JD (2006) The physics of optimal decision making: a formal analysis of models of performance in two-alternative forced-choice tasks. Psychol Rev 113:700–765
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Drugowitsch J, Moreno-Bote R, Churchland AK, Shadlen MN, Pouget A (2012) The cost of accumulating evidence in perceptual decision making. J Neurosci 32:3612–3628
Ratcliff R (1978) A theory of memory retrieval. Psychol Rev 85:59–108
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Miller, P. (2014). Decision Making, Threshold. In: Jaeger, D., Jung, R. (eds) Encyclopedia of Computational Neuroscience. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-7320-6_315-6
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DOI: https://doi.org/10.1007/978-1-4614-7320-6_315-6
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Latest
Decision Making, Threshold- Published:
- 28 July 2014
DOI: https://doi.org/10.1007/978-1-4614-7320-6_315-6
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Original
Decision Making, Threshold- Published:
- 25 February 2014
DOI: https://doi.org/10.1007/978-1-4614-7320-6_315-5