Fig. 2.

RTCON2. The distribution of evidence for an item on a given trial drives six mutually inhibitory accumulators (one for each confidence category). The proportion of the distribution between the confidence criteria on the match dimension drives the drift rate for each confidence category. When one of the accumulators reaches its decision boundary, the corresponding response is made. Each time one accumulator takes a step up of size x, the accumulators on the opposite side take a x/(N/2) step down (where N is the number of accumulators) such that the amount of evidence stays constant (i.e., if an ‘intact’ accumulator is incremented, then the ‘rearranged’ accumulators are all decremented and the other ‘intact’ accumulators are unchanged).