Teen pot smoking lowers adult IQ? A second look says maybe not

In late August, baby boomers (and others whose teen years were spent in a haze of marijuana smoke) seemed to get the comeuppance they had long feared: A study suggested that early and frequent pot smoking resulted in depressed intelligence scores well into adulthood. But a new analysis suggests that in assigning blame for the lower IQ scores they found, the authors of that study may themselves have gotten caught in a haze of confusion.

By Melissa Healy

January 15, 2013