The question: "Have you used any form of illicit drugs over the past 2 months?" will most likely result in measurement error if the question is answered.

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This question may result in measurement error as it relies on self-reporting which may be influenced by social desirability bias and the person's willingness to admit to using illicit drugs. Additionally, the question only asks about the past 2 months, which may not capture more infrequent or sporadic drug use.

The Question: "Have You Used Any Form of Illicit Drugs