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Viewpoint: What it means for the world to have a collective IQ of 82

| | April 19, 2019

David Becker has released a new version of the World’s IQ. Each country has a score showing the cognitive abilities of their citizens, this being a blend of genetics and the environment of each country, particularly as regards education and health. The world’s global score is 82. This is 12th percentile rank on the Greenwich Mean Intelligence benchmark of IQ 100. As school teachers used to say in end of year reports: “Could do better”.

What does IQ 82 mean in practical terms? The account below gives the achievements as shown in Western economies, with free education and usually free healthcare, and will need to be adjusted for other economies, probably downwards to account for poorer educational systems and the burdens of ill health.

Related article:  Do super high IQ children end up successful?

Here, in broad terms, are descriptions of those in the IQ 75 (5th percentile) to IQ 90 (25th percentile) range.

iq

They have a 21% lower survival up to age 76 (Whalley&Deary 2001). They have about a 50% greater risk of hospitalization for schizophrenia, mood disorder, and alcohol-related disorders (Gale et al. 2010) and for personality disorders (Moran et al. 2009) with more self-reported psychological distress (Gale et al. 2009) and with a greater risk of vascular dementia (McGurn et al. 2008).

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