EXAMINED ARE THE USE OF INDETERMINATE SENTENCING AS A POSITIVE OR NEGATIVE INCENTIVE FOR INMATE CONTROL AND PARTICIPATION IN TREATMENT PROGRAMS AND THE INFLUENCE OF THE PRISON'S SOCIO-PSYCHOLOGICAL ENVIRONMENT ON INMATE REHABILITATION. ALSO CONSIDERED ARE THE ISSUE OF INMATE MANAGEMENT VERSUS INMATE TREATMENT, THE VOLUNTARY/ INVOLUNTARY NATURE OF AN INMATE'S PARTICIPATION IN TREATMENT PROGRAMS, AND THE ROLE OF REHABILITATION PROGRAMS IN PRISON. THE AUTHOR SUGGESTS AN INTEGRATION OF THE TWO PRISON OBJECTIVES OF CONTROL AND TREATMENT BY STRUCTURING THE ENVIRONMENT TO ENCOURAGE THE INMATE TO PARTICIPATE IN APPROPRIATE TREATMENT, WHILE PROVIDING NO NEGATIVE INCENTIVES FOR NON-PARTICIPATION. AT THE SAME TIME, POSITIVE REINFORCEMENT WOULD BE USED TO ACCOMPLISH INMATE CONTROL, WITH NEGATIVE REINFORCEMENTS OR RESTRICTIONS BEING USED WHEN NECESSARY FOR DISCIPLINARY PURPOSES.