Figure 3
From: Drift–diffusion models for multiple-alternative forced-choice decision making
Decision-making dynamics for three alternatives. (A) A comparison of the dynamics from integration of the coupled firing rate equations Eq. (38) (solid lines) and from the DDM, Eq. (40) (dotted lines). (B) The dynamics from three separate simulations of the DDM, Eq. (40), indicating three different winning alternatives. Parameters are \(\tau = 20\text{ ms}\), \(\tau _{I} = 10\text{ ms}\), \(s = c = g = \)1, \(\sigma = 0.01\). The function \(\phi (x) = 0\) for \(x<0\), \(x^{2}\) for \(0\le x\le 1\) and \(2 \sqrt{x-3/4}\) for \(x>1\). For this choice of transfer function and these parameter values, there is a bifurcation for \(I_{0} = 1/2\), which is the value taken here. The steady-state firing rate \(R = 1/4\). The threshold \(\theta = 1/2\)