What accounts for global rise in IQ scores?

When President Donald Trump infamously declared his preference for immigrants from Norway, he was presumably unaware that he had selected one of the few developed economies in the world experiencing a decline in average IQ.

Norway and the other Nordic countries have seen an IQ downturn, admittedly from relatively high levels, even while intelligence measurements in the rest of the world continue their long upward rise.

Already a subscriber? 

Read the full story and more at $9.90/month

Get exclusive reports and insights with more than 500 subscriber-only articles every month

Unlock these benefits

  • All subscriber-only content on ST app and straitstimes.com

  • Easy access any time via ST app on 1 mobile device

  • E-paper with 2-week archive so you won't miss out on content that matters to you

Join ST's Telegram channel and get the latest breaking news delivered to you.

A version of this article appeared in the print edition of The Straits Times on March 08, 2018, with the headline What accounts for global rise in IQ scores?. Subscribe