Figure 2

A Bayesian MSPRT is equivalent to DDMs with moving threshold. Accuracy and reaction time for three alternatives. A. Accuracy as a function of the mean of input 1 for the Bayesian test, Eq. (23) (solid line), for the DDM with moving threshold (dotted line) and the DDM with fixed threshold (dashed line). Note that the Bayesian test and the DDM with MT give identical results and are, in fact, mathematically identical. B. Reaction times for the Bayesian test (solid line), DDM with MT (dotted line) and DDM with fixed threshold (dashed line). Orange lines are for error reaction times. Error bars indicate the standard error of the mean. Other parameter values are: \(\sigma = 0.03\), \(I_{i} = 0\) for \(i = 2,3\), \(\theta = 1.05\) with MT and \(\theta = 1.073\) with fixed threshold. The thresholds were chosen to give identical reaction times for \(I_{1} = 0\). The values shown are averages over 10,000 trials for each value of the input