THE SPECIFIC PROBLEM WAS WHETHER HUMANS, AFTER HAVING BEEN TRAINED ON A GIVEN REWARD SCHEDULE TO ACT IN A GIVEN WAY IN GIVEN CIRCUMSTANCES, WILL EXHIBIT FIXED EXTINCTION BEHAVIOR REGARDLESS OF THE DIFFERENCES BETWEEN THE TRAINING AND THE EXTINCTION PERIODS. SUBJECTS WERE 360 COLLEGE STUDENTS WHO HAD VOLUNTEERED FOR THE EXPERIMENT. AN APPARATUS WAS USED THAT FED BB'S WHEN A KNOB WAS PULLED AND THE BB'S ACTED AS THE REWARDS. A PROGRAMER FED THE BB'S ON A SET VARIABLE RATIO REINFORCEMENT SCHEDULE. THE HYPOTHESIS THAT EXTINCTION BEHAVIOR WOULD BE RELATED TO THE AMOUNT OF REWARD WAS SUPPORTED, ALTHOUGH THE CIRCUMSTANCES WERE SUCH AS TO CAST SOME DOUBT UPON IT. IN THE LIGHT OF THE LITERATURE ON THE RELATIONSHIP BETWEEN REWARD AND BEHAVIOR IT MIGHT BE INTERESTING TO PURSUE THIS FINDING FURTHER. (JL)