A method of shaping greater speed and accuracy with programmed materials is described. An adjusting schedule of reinforcement, in which reinforcement (in the form of points or money) was contingent upon each of 4 Ss' gradually increasing his speed and accuracy, was used effectively. Ongoing research involves the use of different step-sizes in the adjusting schedules and Ss choose which of two contingencies, time or errors, they will attempt to meet.
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