Most Ss in probability-learning experiments do not maximize, perhaps because they expect sequential patterns. The purpose of this experiment was to determine whether or not the elimination of the objective tenability of sequential dependencies would increase the proportion of maximizing responses. 21 Ss in the experimental condition controlled the random generation of events by throwing a die so that sequential dependencies were objectively unreasonable. 21 control Ss were presented prearranged sequences, making it reasonable for S to anticipate sequential patterns. Results confirmed the experimental hypothesis; experimental conditions led to more maximizing responses than did control conditions at the .01 level of significance. (PsycINFO Database Record (c) 2006 APA, all rights reserved)