Fig. 2.

(A) Illustration of the changes in task activation for the cued task (solid lines) and the uncued task (dashed lines) over trials when alternating between 2 tasks. Markers show the task activations at particular trials, and lines show the activation between trials, to illustrate the underlying dynamics. The model predictions are based on the following parameter settings: $g$ = 0.9, $h$ = 1.6, $u=0.2$, and $v=1$. The speed of task switching is assessed as the slope $\mathrm{\Delta }w$ of the task-activation function at the first switch trial, separately for cued and uncued tasks. (B) Illustration of processing in an incongruent trial with leaves pointing up and moving down. The cued dimension in this example trial is pointing, and the correct response corresponds to the up direction. The activation of perceptual features ($a$) is weighted by task activation ($w$), and the resulting weighted activations ($b$) are summed across dimensions to produce the drift rates for the 4 response alternatives ($c$). The evidence accumulator for the U (up) response reaches the decision threshold first and determines the response choice and response time. D, down; L, left; M, moving; P, pointing; R, right; U, up.