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The biggest problem with this study is a huge selection effect.

The biggest problem with this study is a huge selection effect. The users of marijuana are very different then non users, and heavy users are very different from light light users. This by itself would show large correlations across a large swath of measurements.

Posted by JamesBarney on Aug 28, 2014, 5:33 PM

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The biggest problem with this study is a huge selection effect.

JamesBarneyAug 28, 2014, 5:33 PM

The biggest problem with this study is a huge selection effect. The users of marijuana are very different then non users, and heavy users are very different from light light users. This by itself would show large correlations across a large swath of measurements.

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