FixedVariable Ratio Every so many; a set number After an unpredictable number; a changing number Interval Every so often; a fixed amount of time Unpredictably.

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FixedVariable Ratio Every so many; a set number After an unpredictable number; a changing number Interval Every so often; a fixed amount of time Unpredictably often; a changing amount of time Schedules of Reinforcement

A.Fixed Ratio B.Variable Ratio C.Fixed Interval D.Variable Interval 1.Buying scratch-off lottery tickets and sometimes winning. 2.A hotel maid may take a 15-minute break after cleaning 10 rooms. 3.Receiving an allowance every Sunday. 4.Checking the front porch for a newspaper when the deliverer is extremely unpredictable. 5.Checking the oven to see if chocolate chip cookies are done, when baking time is known. FR VR FI VI FI Schedules of Reinforcement

A.Fixed Ratio B.Variable Ratio C.Fixed Interval D.Variable Interval 6.A blueberry picker receives $1 after filling three pint boxes. 7.A charitable organization makes an average of 10 phone calls for every donation it receives. 8.Repeatedly calling a garage mechanic to see if your car is fixed yet. 9.A student’s final grade improves one level for every three book reviews submitted. 10.A professional baseball player gets a hit approximately every third time at bat VR FR VR VI FR Schedules of Reinforcement