How accurate are online IQ tests?
Online IQ tests vary a lot. Some are careful attempts at a rough estimate. Others are built to look scientific while collecting your email or your money. Here is how to tell the difference.
What a short online test can and cannot tell you
A well-made online test can give a rough idea of how you compare with other people on reasoning puzzles. It cannot give a precise or clinical IQ. Expect the true figure to fall anywhere in a range of 10 to 15 points around the estimate, and expect repeat attempts to differ.
What makes a test more trustworthy
- It says clearly that the result is an estimate and not a clinical assessment.
- It uses a mix of question types: patterns, numbers, shapes, logic and words.
- It weights harder questions more than easy ones.
- It explains how the score is worked out and what the norm group is.
- It shows a range or a margin of error instead of one exact number.
Warning signs of a bad test
- It asks for payment or a card number after you finish the questions, just to see your score.
- It signs you up for a subscription or a free trial that turns into a charge.
- The score seems to come out about the same, and flattering, whatever you answer.
- It claims to be a "certified" or "official" IQ test with no named psychologist or published method.
- It insists on an email address or account before you can start.
How we handle this
HonestIQ needs no account, shows your level for free, and unlocks the exact estimate, range and full report after you watch one free ad. We do not charge or store card details. Our norms are provisional and improve as more people take the test, which is why we give a range and say so plainly.