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Reward rate as a function of the thresholds for the two-stage model. The parameters are μ1 = 0.5, μ2 = −0.1, σ1 = σ2 = 0.1, x0 = ζ1/2, and t1 = 0.1. The non-decision time Tnd = 0.3. Note that the maximum reward rate is achieved for ζ1 ≠ ζ2.
