Scientific Research

Confirming Druid's Accuracy, Sensitivity, and Utility

Effects of High Potency Cannabis on Psychomotor Performance in Frequent Cannabis Users



Cannabis and Cannabinoid Research


University of Colorado, Boulder; Washington State University; Impairment Science, Inc.


Karoly, H. C., Milburn, M. A., Brooks-Russell, A., Brown, M., Streufert, J., Bryan, A. D., Lovrich, N. P., DeJong, W., Bidwell, L. C. (2020)

Assessment of cognitive and psychomotor impairment, subjective drug effects, and blood THC concentrations following acute administration of oral and vaporized cannabis


Journal of Psychopharmacology


The Johns Hopkins University School of Medicine, Behavioral Pharmacology Research Unit


Spindle, T R., Martin, E., Grabenauer, M., Woodward, T., Milburn, M., & Vandrey, R. (2020)

Please contact us for a full copy of the article.

An investigation of the DRUID® smartphone/tablet app as a rapid screening assessment for cognitive and psychomotor impairment associated with alcohol intoxication


Vision Development Rehabilitation, 5, 31-42


Richman, J.E., & May, S. (2019)

Why Druid Works

Research Using Druid

Institution Researcher Project
University of Sydney Dr. Danielle McCartney CBD and Driving Impairment
Yale University Dr. Godfrey Pearlson DRUID and driving
University of Kentucky Dr. Shanna Babalonis Alcohol, opioids and cannabis
Johns Hopkins Medical Institute Dr. Kelly Dunn Opioid impairment
Johns Hopkins Medical Institute Dr. Tory Spindle & Dr. Elise Weerts Alcohol and cannabis in combinations
Johns Hopkins Medical Institute Dr. Ryan Vandrey Demonstration of proof of concept
UCLA Dr. Ziva D. Cooper Medical Cannabis
Washington State University Dr. Nick Lovrich Green Labs; Frequent cannabis users study

"... a novel mobile device application (the DRUID), was the most sensitive measure of impairment when compared to the other cognitive performance tasks administered (i.e., the DSST, DAT, and PASAT) as well as several common field sobriety tests (i.e., the WT, OLS and MRB).”

-Dr. Ryan Vandrey, The Johns Hopkins School of Medicine