Abstract
Two groups of 10 college male Ss were given different money reinforcement schedules in single 1-hr. work periods for each S (following a combination of “pretests” and a questionnaire, used for reasons described). The work was that of repetitively pulling a manipulandum against a constant-tension spring requiring 25 lb. of force, horizontally, through 5/8-in. distance. The control group was paid at a rate of 10¢ for each 1000 pulls. The test Ss were paid in advance with instructions that they had the job of working at the machine for 1 hr, if they wished (though they were required to remain in the room) and were given the maximum rate of pay ($1.50 per hour) which it was anticipated the control Ss might earn. The test Ss were told that their work “may provide information on which to base later studies.” As predicted, the control Ss showed markedly greater output (approximately 100% greater) than that obtained from Ss paid in advance, on a time basis.
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