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Wednesday, March 16, 2011

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It's worth looking closely at this study because very quickly the incredibly weak nature of its conclusions become clear.

It’s not about clinically diagnosed psychosis at all. It’s about what may be just one trivial thought or mental confusion in the space of 10 years. The authors call it "subclinical expression of psychosis in the general population...that is, expression of psychosis below the level required for a clinical diagnosis." Astonishingly, that's enough for a "positive".

Once you delve behind the headlines, phrases like “might under certain circumstances” start to appear and then you realise how meaningless the study’s conclusions are.

Something else that nearly all the reports of this study have missed out is the authors statement that "The evidence on cannabis and psychosis has influenced the decision in the UK to retain criminal penalties for cannabis use, despite evidence that removing such penalties has little or no detectable effect on rates of use. An informed cannabis policy should be based not only on the harms caused by cannabis use, but also on the harms caused by social policies that attempt to discourage its use, such as criminal penalties for possession and use."


Putting Cannabis "Research" Into Perspective.

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