Developing a phone-based measure of impairment after acute oral ∆
Acute consumption of cannabis or its primary psychoactive ingredient ∆ We aim to develop and validate a prototype for a mobile phone application to measure ∆ We conducted two double-blind, within-subjects studies examining impairments after oral doses of ∆ ∆ The phone tasks were brief, to facilitate use in a non-laboratory setting, but it is likely that this made them less sensitive to the impairing effects of ∆