Research: IQ and aptitude test data you can cite

Small, carefully sourced datasets on how intelligence and aptitude are tested. Every figure links to the study, ruling or official page it came from, and each dataset comes with a CSV, copy-paste citations and an embed. Where we could not confirm a number, we say so or leave it out.

By the LifeScore Editorial Team · Updated · How we check

35
Dated events in the history of IQ testing
13
National Flynn effect studies compared
35
Published minimum scores, by source type
61
Sources cited across the datasets

The datasets

Embeddable calculator

The same normal-distribution maths as our IQ percentile calculator, sized for a blog post or a class page. No tracking inside the frame.

Embed this on your site

Paste this into your page. It works at any width from 300 to 700 pixels. Please keep the link below the frame; it is how readers find the full page.

<iframe src="https://lifescoretest.com/embed/iq-percentile-calculator" title="IQ percentile calculator by LifeScore" width="100%" height="460" style="border:0;max-width:700px" loading="lazy"></iframe>
<p><a href="https://lifescoretest.com/tools/iq-percentile-calculator">IQ percentile calculator</a> by LifeScore</p>

Use the IQ percentile calculator on its own page, with the working explained.

How we check

  • Named sources only. Each number links to the paper, court ruling, publisher page or official site it came from. Every source is also listed on our sources page.
  • We show how sure we are. Figures we saw only in reports of a study, or only on prep sites, are labelled that way in the table and in the CSV.
  • Our own arithmetic is shown. Where we turn a study's figures into a rate, the working sits next to the number.
  • Corrections. If you find an error, tell us through the press and media page. Our methodology page explains how LifeScore scores its own tests.