This investigator evaluated the role of adverse impact in the use of psychological screening tests such as the MMPI and CPIfor selection of California Highway Patrol officer candidates and other peace officers. The research literature was reviewedfor reports ofsignificant Hispanic-Anglo-American test score differences. A meta-analysis was performed of studies that had been correctedfor the effects of moderator variables. The data showed little interstudy reliability or stability in the report of MMPI basic scale differences with the exception of the L scale. In 13 out of 16 studies, Hispanics scored significantly higher on the L scale than Anglos with an effect size of .56. Results are discussed at different levels, from the item level to the ethical level. Overall, the only adverse impact noted was the significantly higher failure rate of Hispanics on a pretest written exam.
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