Chunk #77 — ABCD substance use battery: baseline measures — Consequences of substance use: baseline — Symptoms of substance use disorders (Youth-Administered) — Marijuana and Other Drugs.
The Marijuana Problem Index (MPI) (Johnson and White, 1989; Simons et al., 1998) and the Drug Problem Index (DPI) (Johnson and White, 1989; Caldwell, 2002; Kingston et al., 2011) are parallel versions of the RAPI designed with the same goals in mind, but focus on problems from cannabis use and other drug use, respectively. The MPI has high internal consistency (>0.85) based on several studies (Simons et al., 1998; Simons and Carey, 2002, Simons and Carey, 2006). Detailed psychometric data for the DPI have not been reported. The MPI and DPI used in ABCD consist of the same instructions and 18-items as the RAPI, but any references to “alcohol” or “drinking” are replaced with “smoking or marijuana use” or “use” for the MPI and DPI, respectively. Both rely on a 5-point Likert scale to indicate the number of times that a participant has experienced a given problem: 0 times; 1–2 times; 3–5 times; 6–10 times, 10+ times. The DPI is filled out considering all illicit drug use (aside from cannabis).
