The MSHQ is a self-report instrument that assesses marijuana smoking rate (lifetime and past 30 days), age of onset at use initiation, years of being a regular marijuana smoker, and other related descriptive information (e.g., number of attempts to discontinue using marijuana). The MSHQ has been employed successfully in the past as a descriptive measure of marijuana use history and pattern (e.g., Bonn-Miller et al., 2007; Bonn-Miller & Zvolensky, 2009). The current study utilized the item rating marijuana use in the past 30 days to index marijuana use frequency.
