International IQ Test: What It Is, and How Its Own Data Holds Up
A free test with 16M+ takers and published technical reports — plus a copycat using the same name. Here's how to tell them apart.
5 min read
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Free IQ test, practice questions, and guides to testing for adults and children.
15 articles
IQ Test: 10 Questions — What a Short Test Can Tell You
A 10-question IQ test isn't new — a validated short-form version has existed since the 1960s. Here's what the real research says about the format.
5 min read
Chipotle IQ Test: What It Actually Is (It's Not an IQ Test)
Chipotle IQ isn't a cognitive test — it's brand trivia with real prizes. Full history, how it works, and what "IQ" is actually measuring.
5 min read
123test IQ Test Review 2026: Every Tier, Every Subtest
123test runs 18 tests across 3 tiers, one doubling as a real high-IQ-society admissions test. Here's the subtest-level breakdown nobody else covers.
6 min read
Does an IQ Test Need Your Email? What Free Tests Collect
Some free IQ tests ask for your email before showing results, others don't. Here's what that data is actually used for, and how to tell them apart.
3 min read
Test Anxiety and IQ Tests: How Much Does It Cost You?
Test anxiety lowers scores — but the worrying does the damage, not the racing heart. What 238 studies show, and which subtests are most exposed.
6 min read
Gifted Identification: How Children Are Actually Selected
The 130 threshold, the General Ability Index, extended norms — and the evidence that gifted identification fails at referral, not testing.
7 min read
Mensa Norway IQ Test: What Your Score Actually Means
The Mensa Norway test is 35 puzzles in 25 minutes, scored 85–145. Why 145 is a ceiling and not a score, why it can't qualify you for Mensa, and how accurate it really is.
8 min read
Raven's Progressive Matrices: What It Measures & What It Doesn't
Raven's measures eductive ability — half of Spearman's g. Why it is not an IQ test, why it is culture-reduced rather than culture-fair, and where to take the real thing.
6 min read