THE AUTHOR FIRST REVIEWS SUCH METHODS OF DATA COLLECTION AS DIRECT OBSERVATION, INTERVIEWING, TESTS AND QUESTIONNAIRES, AND ANALYSIS OF RECORDS. ELEMENTS OF RESEARCH DESIGN ARE THEN OUTLINED, AND THE TYPES OF RESEARCH DESIGNS - SURVEYS, EXPERIMENTS, PARTICIPANT OBSERVATION, AND JOINT DESIGNS FOR FIELD RESEARCH - ARE DESCRIBED. THE AUTHOR THEN DISCUSSES FIELD RESEARCH METHODS IN RELATION TO OBSERVATION OF CRIMINALS AND THE VICTIM, COMMUNITY, OBSERVATIONS OF THE POLICE, STUDIES OF PROSECUTION AND DEFENSE FUNCTIONS AND PROGRAMS, OBSERVATIONS OF COURT FUNCTIONS, AND INVESTIGATIONS OF CORRECTIONAL FACILITIES AND PROGRAMS. (AUTHOR ABSTRACT MODIFIED)