Figure 4.

SET Model: When a duration is to be timed prospectively, the switch closes allowing pulses to flow from the pacemaker to the accumulator. At the end of the stimulus, the switch opens and pulses stop flowing. The amount of pulses or ticks accumulated is the subjective estimation of the stimulus duration. If this duration is important, or is to be used for future judgments it can then be stored in the reference or long‐term memory. The comparator can make similarity judgments between the current duration (contents of the accumulator) and previously experience duration (contents of the reference memory).