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Cannabis and IQ debate in the media

John Kerr posted in on January 15th, 2013.

A Norwegian economist has questioned the findings of a highly publicised New Zealand study which found a causal link between heavy adolescent cannabis use and a decrease in IQ. However, the authors of the original research have backed their conclusions in the ensuing media coverage. Research published last year, based on data from the Dunedin […]

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Teen cannabis IQ impact questioned – experts respond

John Kerr posted in on January 15th, 2013.

Heavy cannabis use during the teenage years may not be directly responsible for lower IQ, says a researcher questioning the findings of a highly-publicised New Zealand study. However, the authors of the original study remain confident in their findings. Research based on the internationally-renowned Dunedin longitudinal study drew a causal link last year between adolescent […]

TVNZ/NZPA: Iodine deficiency stunts intelligence

Peter Griffin posted in on September 9th, 2009.

Otago researchers have shown, for the first time, that increasing the amount of iodine in a child’s diet in order to correct the mild deficiency common to New Zealanders can measurably improve their perceptual reasoning (intelligence). An excerpt: (read in full here) “Mild iodine deficiency has been an increasing problem in New Zealand over the […]

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