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Research by Joseph Schwartz, a criminologist based at the University of Nebraska, also found slightly elevated rates of criminal behavior among subjects in the highest IQ category.
High Intelligence and criminal behavior are often linked.
The majority of studies have found IQ differences between offenders and nonoffenders (e.g., Ellis &Walsh, 2003). On average, the IQ for chronic juvenile offenders is 92, about half a standard deviation below the population mean. For chronic adult offenders, however, the average IQ is 85, 1 standard deviation below the population mean. A study of Texas inmates who entered the prison system in 2002 indicated that approximately 23% of the inmates scored below 80, almost 69% scored between 80 and 109, and only 9.6% scored above 110 (Ellis & Walsh, 2003).