Richard Rogers, PhD, ABPP
The R-CRAS provides the forensic psychologist or psychiatrist with an empirically based approach to evaluating criminal responsibility. This instrument allows you to quantify the impairment at the time of the crime, to relate the impairment to the appropriate legal standard, and to render an expert opinion with respect to that legal standard. Part I establishes the degree of impairment on psychological variables significant to the determination of insanity. Part II aids in rendering an accurate opinion on criminal responsibility with the ALI standard, and also includes experimental decision models for guilty-but-mentally-ill (GBMI) and M'Naghten standards.
The average alpha coefficient of the R-CRAS summary scales is .60. The mean reliability coefficient for individual variables is .58, with each variable achieving significance. Overall percentage of agreement for the decision variables is 91% with an average kappa coefficient of .81.
Validation studies indicate a high level of accuracy for classifying sane and insane subjects. The R-CRAS is designed for use by professionals with experience in forensic evaluations or those who will be supervised by a qualified professional.
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