Pro
Oakley Ray, PhD, Emeritus Professor of Psychology and Pharmacology at Vanderbilt University, and Charles Ksir, PhD, Professor of Psychology at the University of Wyoming, wrote in their 2004 textbook Drugs, Society, and Human Behavior:
“In everyday use while intoxicated, the marijuana user is unable to easily recall information he or she learned just seconds or minutes before…
[A]lthough reaction time is not greatly affected, if affected at all, there is a great impairment in the ability to engage in tracking behavior, such as keeping a pointer on a spot on a rotating turntable…Behaviorally, the intoxication produced by marijuana does present some danger, especially if the user is driving.”
2004