IN OCOTBER 1973, THE UNITED STATES BOARD OF PAROLE ADOPTED AN ACTUARIAL DEVICE, TERMED A 'SALIENT FACTOR SCORE', AS A RISK ASSESSMENT AID. THIS DEVICE WAS CONSTRUCTED AND INITIALLY VALIDATED ON A SAMPLE OF 1970 RELEASEES UTILIZING A TWO YEAR FOLLOW-UP PERIOD FOR EACH CASE. HOWEVER, AS THE UTILITY OF A PREDICTIVE DEVICE DEPENDS UPON ITS ABILITY TO PREDICT TO PROSEPCTIVE SAMPLES, PERIODIC VALIDATION IS REQUIRED. THIS PAPER DESCRIBES THE APPLICATION OF THE SALIENT FACTOR SCORE TO A SUBSEQUENT VALIDATION SAMPLE OF PRISONERS RELEASED DURING 1972 AND DISCUSSES THE EFFECTS OF USING VARIOUS OUTCOME MEASURES. (AUTHOR ABSTRACT)