Chunk #2 — Method — Design and Procedure

Source

Evaluation of genetic variability in the dopamine receptor D2 in relation to behavioral inhibition and impulsivity/sensation seeking: an exploratory study with d-amphetamine in healthy participants.

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Participants completed four 4-hr sessions in which they received d-amphetamine (5 mg, 10 mg, and 20 mg) or placebo in random order under double-blind conditions. Placebo and d-amphetamine (Mallinkrodt, MO) were placed in size 00 capsules with dextrose filler. Placebo capsules contained dextrose only.