Blog — #validity

Original research, methodology deep-dives, and comparison guides for personality assessments.

2026-05-1010 min readcomparisons
Paid vs Free IQ Tests Online
Free IQ quizzes versus paid normed batteries—norm transparency, scams, fairness, adaptive design, remote limits, plus when licensed testing is warranted.
2026-05-0910 min readmethodology
What Personality Tests Actually Measure (And What They Don't)
Traits vs states vs motivations vs behaviors — a clear guide to what each framework captures, what it misses, and how to combine them for full coverage.