This experiment assessed the role of the number of forced-choice trials on spontaneous alternation in the goldfish. Goldfish were furced to the preferred reinforced arm of a T-maze for 1, 5, 7, 10, or 15 trials. Following these forced-choice trials, the direction of turn on a free-choice trial was recorded. The likelihood of alternation was found to be a function of the number of previous forced-choice trials. The similarity of the functional relationship found in this experiment was related to that found in similar experiments using other species as Ss.