Log in to access your saved results and reports.
Forgot password?New here? Take the free IQ test →
Ask ten people what an IQ test measures and you'll get ten different answers — most of them wrong. It's not "how smart you are" in any general life sense. It's a tightly scoped sample of four specific cognitive abilities that, taken together, predict how quickly you can learn new abstract material.
Modern psychometrics groups cognitive ability into four core factors. Every reputable IQ test — from the WAIS-IV to the Stanford-Binet 5 to the short version on quizvo.com — samples from these:
Your ability to solve novel problems you've never seen before. Pattern recognition, matrix reasoning, sequence completion. This is the closest thing to "raw" intelligence — it doesn't depend on prior knowledge.
Vocabulary, verbal analogies, general knowledge. This taps the information you've absorbed and how well you can manipulate it.
How much information you can hold in mind and operate on simultaneously. Strong working memory correlates more powerfully with IQ than any other single subtest.
How quickly you can perform simple cognitive tasks accurately. Slow processing speed can mask high reasoning ability — which is why timed tests matter.
This is where most public confusion lives. An IQ score doesn't capture:
In 1904 Charles Spearman noticed something strange: people who did well on one type of cognitive test tended to do well on all others. He called this the "g factor" — general intelligence. Over a century of research has confirmed it. The four subdomains above all load onto the same underlying factor, which is what an overall IQ score tries to capture.
Here's where IQ tests genuinely earn their keep. Decades of longitudinal research show IQ predicts:
It's the single best psychological variable for predicting these outcomes — but it's never the only variable. Conscientiousness, for example, predicts career success almost as well.
Partially. IQ predicts academic and occupational outcomes, but conscientiousness, EQ, and opportunity each contribute roughly as much. High IQ helps; it does not guarantee.
Not really. Creativity correlates with IQ up to about 120, then the relationship weakens. Above that point, additional IQ doesn't predict more creative output.
IQ measures cognitive ability — reasoning, memory, processing. EQ measures emotional perception and regulation. They're moderately independent and predict different outcomes.
Closer to "fast-learning smarts." They measure how quickly you can absorb and manipulate abstract information, not how much you already know or how well you navigate social situations.
If the test is properly normed and samples multiple cognitive domains, yes — within roughly ±5 points of a clinical assessment. Single-domain "test your IQ in 60 seconds" quizzes are not meaningful.
The free Quizvo IQ test samples fluid reasoning, verbal comprehension, working memory, and processing speed in 25 questions.
Take the Free IQ Test →