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. 2006 Mar;13(2):127–134. doi: 10.1101/lm.31506

Figure 1.

Figure 1.

Tri-Peak procedure variants. (A) Multiple rewards (✓) can be earned on an individual trial as a result of making the priming of all combinations of the three fixed-interval (FI) values equally probable, thus allowing for multiple clock resets during a trial (Matell and Meck 1999). (B) A single reward can be earned on an individual trial as a result of the priming of a randomly selected FI value, thus maximally resetting the internal clock once per trial (Matell et al. 2004; MacDonald and Meck 2005). No reward is primed on probe trials.