A Bayesian Attractor Model for Perceptual Decision Making
Fig 10
Example evolution of the posterior density of the decision state and the associated confidence values for one trial with a switch of stimulus at 800ms (vertical, dotted line).
(A) Posterior density of the decision state with mean (coloured lines) and two times standard deviation (shading) of decision state variables as in Fig 8A. Grey, dashed lines in A show the decision times for the initial decision (92ms) and the re-decision after the switch (1160ms). (B) Solid lines indicate confidence values for both alternatives, i.e., the posterior probability density values that the decision state is in one of the stable fixed points of the attractor dynamics. The decision threshold is indicated as grey, dashed line. The parameters of the model were those of Fig 7B (r = 2.4, s = 4, q = 0.5).