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Study show long-term effects of lead exposure – In the News

Sarah-Jane O'Connor posted in on March 29th, 2017.

Lead exposure in childhood was linked to lower cognitive function, IQ and socioeconomic status, according to data from the Dunedin Multidisciplinary Health and Development Study. A study published today in JAMA used data from the longitudinal study, which has been tracking a cohort of 1,000 participants born in Dunedin in 1972 and 1973. Of the participants […]

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 […]

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 […]

Teen cannabis and IQ in the news

John Kerr posted in on August 28th, 2012.

New research investigating adolescent cannabis use and its effect on IQ later in life has been widely covered in the media. The study, which was based on the a longitudinal study of over 1,000 people born in Dunedin in 1972-3. Researchers found individuals who started using cannabis in adolescence and used it for years afterward […]

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Teen cannabis use and IQ – experts respond

John Kerr posted in on August 28th, 2012.

The persistent, dependent use of marijuana during adolescence has been linked to later declines in an individual’s intelligence, attention and memory, according to a large,  New Zealand-based study. A team of researchers from New Zealand, the UK and the US analysed data from over 1,000 individuals enrolled in the Dunedin Cohort study and found that […]

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