N&PD Moderators: Skorpio Forums Media, Science and Research Neuroscience and Pharmacology Discussion Long-term cannabis users showed IQ decline from childhood to midlife (mean −5.5 IQ points) JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding. You are using an out of date browser. It may not display this or other websites correctly.You should upgrade or use an alternative browser. Members who reacted to message #5 All (2) Like (2) Apr 21, 2022 arrall Bluelight Crew · From Outer Space Messages 6,727 Reaction score 10,387 Points 320 Apr 21, 2022 jasperkent Bluelighter · 66 · From Chattanooga, TN Messages 7,436 Reaction score 9,523 Points 320 Loading… Forums Media, Science and Research Neuroscience and Pharmacology Discussion Long-term cannabis users showed IQ decline from childhood to midlife (mean −5.5 IQ points)