Cognitive Demand Index: 100 US Jobs Ranked by Brain Power (and What They Pay)
The Cognitive Demand Index maps IQ by occupation across 100 US jobs using O*NET reasoning data and BLS 2024 wages. See where brain power and pay diverge.
Scoring & Methodology
Scoring & Methodology
How IQ scores are calculated, what percentiles mean, and the validity and reliability behind cognitive assessment.
Your IQ Is a Range, Not a Number: What Confidence Intervals Really Mean
Every IQ score is a range, not a fixed number. Learn what Standard Error of Measurement means, why scores shift, and how to read your confidence interval.
Does Your IQ Predict Job Satisfaction? The Science of Cognitive Mismatch
A study of 87,229 workers shows IQ alone doesn't predict job satisfaction, but the match between your brain and your job's complexity does. See the data.
Cognitive Job Fit: What Happens When Your IQ Score Outpaces Your Role
When cognitive ability exceeds role demands, burnout and turnover spike. Learn how to identify cognitive mismatch and realign your career with your IQ profile.
Why High-IQ Workers Burn Out in Easy Jobs: The Science of Cognitive Mismatch
25% of workers are cognitively overqualified. Learn how IQ scoring science explains why easy jobs cause burnout and how to find your sweet spot.
What Your IQ Subscores Reveal About Your Ideal Career Path
Your IQ subscores predict career fit better than a single number. Learn how verbal, perceptual, memory, and speed profiles map to ideal roles.
Can You Retake an IQ Test? Practice Effects Explained
Can retaking an IQ test improve your score? Science says yes -- by 3-7 points. Learn about practice effects, optimal retest intervals, and what gains mean.
WAIS vs Stanford-Binet vs Online: How IQ Tests Compare
Compare WAIS-IV, Stanford-Binet 5, and online IQ tests side by side. See costs, accuracy, and which test is right for your goals. Data-driven comparison.