RANDOMIZED EXPERIMENTS ARE DEFINED AS SITUATIONS IN WHICH MEMBERS OF A SPECIFIED TARGET POPULATION ARE RANDOMLY ALLOCATED TO ONE OF TWO OR MORE TREATMENT PROGRAMS OR PROGRAM VARIATIONS. SYSTEMATIC OBSERVATIONS ARE MADE ON THE TARGET POPULATION'S RESPONSE TO TREATMENT. THE CONTENTS OF THE BIBLIOGRAPHY SERVE AS EMPIRICAL EVIDENCE FOR THE CONTENTION THAT RANDOMIZED EXPERIMENTAL TESTS ARE FEASIBLE IN A VARIETY OF PROGRAM SETTINGS. THE ENTRIES ARE ORGANIZED ACCORDING TO 10 TOPIC AREAS THAT DEAL WITH SOCIAL REHABILITATION PROGRAMS FOR JUVENILE AND CRIMINAL OFFENDERS, LAW-RELATED AND LAW ENFORCEMENT PROCEDURES, REHABILITATION PROGRAMS IN MENTAL HEALTH, TRAINING AND EDUCATION PROGRAMS, SOCIOMEDICAL AND FERTILITY CONTROL EXPERIMENTS, COMMUNICATION METHODS AND MEDIA EFFECTS, INFORMATION VALIDITY AND UTILITY, ECONOMIC EXPERIMENTS, SURGICAL AND SOCIAL REHABILITATION OF CRIMINAL OFFENDERS, AND EFFECTS OF WELFARE SERVICES ON CHILDREN AND ADULTS.