IQ

Healthier Diets in Children Lead to a Healthier IQ

Published: August 8, 2012
ᔥUniversity of Adelaide.
boy eating pizz

Children fed healthy diets in early age may have a slightly higher IQ, while those on heavier junk food diets may have a slightly reduced IQ, according to new research from the University of Adelaide.

The study – led by University of Adelaide Public Health researcher Dr Lisa Smithers – looked at the link between the eating habits of children at six months, 15 months and two years, and their IQ at eight years of age.

The study of more than 7000 children compared a range of dietary patterns, including traditional and contemporary home-prepared food, ready-prepared baby foods, breastfeeding, and ‘discretionary’ or junk foods.

“Diet supplies the nutrients needed for the development of brain tissues in the first two years of life, and the aim of this study was to look at what impact diet would have on children’s IQs,” Dr Smithers says.

“We found that children who were breastfed at six months and had a healthy diet regularly including foods such as legumes, cheese, fruit and vegetables at 15 and 24 months, had an IQ up to two points higher by age eight.

“Those children who had a diet regularly involving biscuits, chocolate, lollies, soft drinks and chips in the first two years of life had IQs up to two points lower by age eight.

“We also found some negative impact on IQ from ready-prepared baby foods given at six months, but some positive associations when given at 24 months,” Dr Smithers says.

Dr Smithers says this study reinforces the need to provide children with healthy foods at a crucial, formative time in their lives.

“While the differences in IQ are not huge, this study provides some of the strongest evidence to date that dietary patterns from six to 24 months have a small but significant effect on IQ at eight years of age,” Dr Smithers says.

“It is important that we consider the longer-term impact of the foods we feed our children,” she says.

The results of this study have been published online in the European Journal of Epidemiology.

IQ link to drug use

Published: November 16, 2011

cocaineGirls with high childhood IQs are more likely to take illegal drugs in their 30s, research has uncovered.

Dr James White from the Centre for the Development and Evaluation of Complex Interventions for Public Health Improvement (DECIPHer) examined data from just under 8000 people in the 1970 British Cohort Study, a large ongoing population based study, which looks at lifetime drug use, socioeconomic factors, and educational attainment.

The IQ scores of the participants were measured at the ages of 5 and 10 years, using validated scales, and information was gathered on self reported levels of psychological distress and drug use at the age of 16, and again at the age of 30.

Drugs assessed at 16 included cannabis and cocaine; and at 30 years of age included cannabis; cocaine; amphetamines; and ecstasy.

By the age of 30, around one in three men (35.4%) and one in six women (15.9%) had used cannabis, while 8.6% of men and 3.6% of women had used cocaine, in the previous 12 months. A similar pattern of use was found for the other drugs, with overall drug use twice as common among men as among women. [continue reading…]

Steven Pinker’s take on technology, intelligence and self control

Published: June 12, 2010

Yesterday’s NYT Mind over Mass Media – Steven Pinker does a great job of addressing the debate that the internet has a negative effect on cognitive functioning.

Yes, the constant arrival of information packets can be distracting or addictive, especially to people with attention deficit disorder. But distraction is not a new phenomenon. The solution is not to bemoan technology but to develop strategies of self-control, as we do with every other temptation in life. Turn off e-mail or Twitter when you work, put away your Blackberry at dinner time, ask your spouse to call you to bed at a designated hour.
And to encourage intellectual depth, don’t rail at PowerPoint or Google. It’s not as if habits of deep reflection, thorough research and rigorous reasoning ever came naturally to people. They must be acquired in special institutions, which we call universities, and maintained with constant upkeep, which we call analysis, criticism and debate. They are not granted by propping a heavy encyclopedia on your lap, nor are they taken away by efficient access to information on the Internet. continue reading


Source: New York Times

There’s more to intelligence than just IQ.

Published: November 2, 2009

Is George W Bush stupid? It’s a question that occupied a good many minds of all political persuasions during his turbulent eight-year presidency. The strict answer is no. Bush’s IQ score is estimated to be above 120, which suggests an intelligence in the top 10 per cent of the population. But this, surely, does not tell the whole story. Even those sympathetic to the former president have acknowledged that as a thinker and decision-maker he is not all there.

IQ SCORES have long been regarded with suspicion, and now there turns out to be another reason to be sceptical about them. Among the attributes that IQ tests fail to capture is our capacity for rational decision-making. Link to the full article in today’s New Scientist

Source: New Scientist

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