Childhood IQ and cause of death

Findings from a range of prospective cohort studies based around the world indicate that higher intelligence in children is related to a lower risk of all cause mortality in adulthood - and now a new study, published on bmj.com, is trying to dig into that association further, with a whole population cohort and data on cause specific mortality. Ian J Deary, professor of differential psychology at the University of Edinburgh and one of the authors of that study, joins us to discuss what this tells us, and what might be causing that association. Read the full open access study: http://www.bmj.com/content/357/bmj.j2708