Quantifying cannabis use with the timeline followback approach: a psychometric evaluation.

  title={Quantifying cannabis use with the timeline followback approach: a psychometric evaluation.},
  author={Melissa M Norberg and Jennifer Mackenzie and Jan Copeland},
  journal={Drug and alcohol dependence},
  volume={121 3},
BACKGROUND In the absence of a standardized cannabis unit, self-report instruments are inadequate for accurate quantification of cannabis use. The study extends the feasibility of using a cannabis substitute to reliably and validly measure quantity of cannabis use. METHOD Ninety-eight adult Australian cannabis users (M age=27.98, SD=11.10; 65.31% male) completed a 90-day Timeline Followback interview regarding their cannabis use, utilizing the cannabis substitute Marijuanilla to report on… CONTINUE READING
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