DATA WERE SUPPLIED TO THE WISCONSIN COUNCIL ON CRIMINAL JUSTICE BY THE OFFICE OF SYSTEMS AND EVALUATION WITHIN THE WISCONSIN DIVISION OF CORRECTIONS (DOC). THE DESIGN AND IMPLEMENTATION OF THE DESIGN THAT GENERATED THE DATA ARE PART OF A LARGER DOC EVALUATION OF MAP. INITIAL ANALYSES INDICATED THAT INDIVIDUALS WHO COMPLETED THE MAP PROGRAM SERVE AN AVERAGE OF 2.8 MONTHS LESS TIME THAN INDIVIDUALS WHO DID NOT PARTICIPATE. PARTICIPATION IN THE MAP PROGRAM INVOLVES BOTH SELF-SELECTION AND SELECTION BY THE PAROLE BOARD. VALID COMPARISONS BETWEEN MAP PARTICIPANTS AND THOSE WHO DID NOT PARTICIPATE IN MAP WERE CONDUCTED ONLY AFTER STATISTICAL ADJUSTMENTS WERE MADE TO THE DATA. THIS BECAME NECESSARY BECAUSE VARIABLES RELATED TO MAP PARTICIPATION WERE ALSO RELATED TO THE LENGTH OF INCARCERATION. A MULTIPLE REGRESSION PROCEDURE WAS USED TO STATISTICALLY ADJUST FOR DIFFERENCES BETWEEN MAP PARTICIPANTS AND THOSE WHO DID NOT PARTICIPATE IN MAP ON SUCH KEY VARIABLES AS THE LENGTH OF SENTENCE, PRIOR FELONY CONVICTIONS, TYPE OF ADMISSION AND TYPE OF OFFENSE. WHEN SUCH ADJUSTMENTS WERE MADE, THERE WAS NO EVIDENCE TO SHOW THAT THE MAP PARTICIPANTS SERVED LESS TIME THAN THE INDIVIDUALS WHO DID NOT PARTICIPATE IN MAP. THERE IS SOME EVIDENCE WHICH SUGGESTS THAT A MAP PARTICIPANT WOULD SERVE MORE TIME THAN A SIMILAR INDIVIDUAL WHO DID NOT PARTICIPATE IN THE MAP PROGRAM. APPENDIXES CONTAIN CLASSIFICATION OF TYPE OF OFFENSE, A CORRELATION MATRIX OF VARIABLES USED FOR THE REGRESSION ANALYSIS OF TIME SERVED, AND DOC RESPONSE. (AUTHOR ABSTRACT MODIFIED).