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AnthonyAdministratorMarch 1, 2022 at 8:34 PM
the first lab study conducted in 1977 had an average age of 27.43 (pdf page 27 of the study). In the second lab study conducted in 1981, the largest age group of participants was 25-34 years old (46.2%) (pdf page 24 of the study). The remaining studies were field studies using random enforcement stops.