Abstract
The full text of this article is freely and openly accessible from the following repository: https://europepmc.org/article/MED/23599952
We reported (PNAS, 2012, 109: E2657-64) that persistent cannabis use was associated with neuropsychological decline, from adolescence to midlife. Two commentators (Rogeberg and Daly) suggested alternative explanations; we tested these and report the results here.