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 #13 All (1) Like (1) Apr 22, 2022 DeathIndustrial88 Bluelighter · From The Land Of Nod Messages 3,691 Reaction score 4,571 Points 120 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)