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Time-course effects of d-amphetamine (10 mg/70 kg) and diazepam (10 mg/70 kg) on the Addiction Research Center Inventory (ARCI) Amphetamine (upper panels) and Profile of Mood States (POMS) Vigor (middle panels) scales and on Visual Analog Scale (VAS) Sleepy (lower panels) ratings for low (left panels) and high (right panels) sensation seekers. Error bars represent ± 1 SEM.
