The DRUIDapp is widely used in the scientific community to study impairment.

The DRUID® app is designed to assess a user’s level of cognitive and motor impairment due to any underlying cause. Informed by impairment research, the app requires users to perform four tasks that measure reaction time, accuracy of decision making, hand-eye coordination, time estimation, and balance. Importantly, three of the four tasks are divided-attention tasks.

All four tasks can be completed in just under three minutes. The app collects and statistically integrates hundreds of measurements, thereby producing an overall impairment score (T-score) ranging from 0 to 100. In practice, most T-scores fall between 30 and 70.

  • Directly tests impairment
    • Drugs, alcohol, fatigue, injury, illness
  • Fast
    • 4 tasks take about 3 minutes
  • Accurate
    • Calibrated to measured blood alcohol concentration (BAC)
  • Inexpensive
    • Contact us for pricing based on usage.

Here are some of the research studies using the app as the measurement tool.

University of SydneyDr. Danielle McCartneyCBD and Driving Impairment
Yale UniversityDr. Godfrey PearlsonDRUID and driving
Univ of KentuckyDr. Shanna BabalonisAlcohol, opioids and cannabis
Johns Hopkins Medical InstituteDr. Kelly DunnOpioid impairment
Johns Hopkins Medical InstituteDr. Tory Spindle & Dr. Elise WeertsAlcohol and cannabis in combinations
Johns Hopkins Medical InstituteDr. Ryan VandreyDRUID app–demonstration of proof of concept
University of Colorado, School of Public HealthDr. Cinnamon BidwellFrequent cannabis users, high-potency cannabis
Washington State UnivDr. Nick LovrichGreen Labs; Frequent cannabis users study
Brown UnivDr. Jane MetrikAlcohol consumption after cannabis

“… a novel mobile device application (DRUIDapp), was the most sensitive measure of impairment when compared to the other cognitive performance tasks administered as well as several common field sobriety tests.”

Dr. Ryan Vandrey, Johns Hopkins Medical Center