PSYCH 3CC3 Study Guide - Final Guide: Forensic Psychiatry, Sex Offender

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Thorberry & jacoby 1979 - u. s supreme court: 586 patients released from pennsylvania instruction, 3-year return/recidivism rate = 23. 7, 4-year violent arrest record = 15% Inter-rater reliability low and similar for both psychiatrists and teachers: psychiatrists (pessimistic) rate offenders as more likely to commit offense than do teachers little use of psychiatric assessments made by either group. Monahan 1981: "psychiatrists and psychologists are accurate in no more than one out of three predictions of violent behaviour" Violence risk assessment research: actuarial methods: ignore the inaccurate clinician, and rely on stat, structured professional judgement: increase clinician"s accuracy by standardizing the assessment process. Absence - negative predictive power npp = r/(r+m) : of all the people, the test identifies as not having the condition, what portion really don"t. Presents - positive predictive power ppp = h/(h+fa) results of a test: of all the individuals that this test identifies as having the condition, what portion really do have a disorder.