Actual impairment should be measured, but not with biological proxies that just show use of cannabis. Grounded in cognitive neuroscience (e.g., reaction time), measuring impairment is what the Druid app from Impairment Science, Inc. does. The conclusion of the 2020 RTI paper mentioned in the article stated, ““Lastly, 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).” Multiple peer-reviewed validation studies published. http://www.impairmentscience.com
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Actual impairment should be measured, but not with biological proxies that just show use of cannabis. Grounded in cognitive neuroscience (e.g., reaction time), measuring impairment is what the Druid app from Impairment Science, Inc. does. The conclusion of the 2020 RTI paper mentioned in the article stated, ““Lastly, 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).” Multiple peer-reviewed validation studies published. http://www.impairmentscience.com