5 min readResearch
Can You Increase Your IQ?
What the evidence supports: a stable adult rank, 1–5 IQ points per year of schooling, why brain-training gains rarely transfer, and what the Flynn effect shows.
Blog — #cognitive-ability
Original research, methodology deep-dives, and comparison guides for personality assessments.
- 5 min readResearch
Average IQ by Age
Why clinical IQ is always compared with your age group, when speed, reasoning and vocabulary each peak, and why My Path's online estimate is not age-normed.
- 5 min readFrameworks
The g Factor Explained: The One Thing Every Cognitive Test Has in Common
Spearman's g and the positive manifold, the competing explanations for it, how factor analysis turns many tests into one score, and what g does and doesn't predict.
- 6 min readFrameworks
What IQ Tests Actually Measure
What IQ tests measure (g and five broad indexes), what scores predict, including the 2022 revision for job performance, what they miss, and how to judge an online test.