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Job candidate completing a cognitive aptitude test during a hiring assessment, illustrating the link between IQ scores and job performance
IQ Science

Does IQ Predict Job Performance? A Shrinking Number

June 30th, 2026

Cognitive ability still predicts job performance, but the corrected correlation fell from r = .51 in 1998 to r = .22 in 2024. See what shrank and what held up.

17 min•Read more
IQ Test Career Recommendations: What They Predict, and the Limits in 2026

IQ Test Career Recommendations: What They Predict, and the Limits in 2026

May 6th, 2026

We audited 7 popular IQ-to-career tools against published validity evidence. Only 1 of 7 disclosed a coefficient. Here is what the field's research says.

21 min•Read more
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