IQ Test

This is a short-form general intelligence test: 16 reasoning items, each with six or eight options and one correct answer, designed to give you a quick read on your overall reasoning ability in about 10 minutes. The items sample the same kinds of reasoning a full battery uses - pattern, sequence, and relational problems - but in a deliberately compact set, so the test is a screen rather than a precise measurement.

Your result is reported on the familiar IQ metric with a population percentile, telling you roughly where your performance places among adults. Because the test is short, it is honest to read the result as a broad band rather than an exact number: 16 items can confidently place you in a wide region of the distribution, but they cannot resolve a precise score the way a longer battery can.

The test estimates general cognitive ability (the g factor) - the broad capacity to reason, see patterns, and solve novel problems - from a small, mixed set of reasoning items. With only 16 items, the standard error around your score is larger than on a full battery, which is the central trade-off of any short form: you gain speed and lose precision. That is a fair exchange when you want a quick orientation, and the wrong tool when you need an accurate, domain-by-domain profile.

What a short IQ screen does well is sort people into broad ability bands and flag whether a fuller assessment is worth your time. What it does not do is pin down a two- or three-point difference, separate verbal from spatial strengths, or certify an exact figure. For any of those, the full 50-item battery is the appropriate instrument.

A century of research finds that performance on diverse cognitive tasks is positively correlated - the basis of the general factor, g - so even a short, mixed reasoning set carries real signal about overall ability. The cost of brevity is reliability: measurement precision falls as the number of items drops, so a short screen yields a wider confidence interval around the estimated score. This is well understood in the psychometric literature and is the reason short forms are framed as screens, not definitive measurements.

Scores here use the standard IQ metric (population mean of 100, standard deviation of 15) with norms from adult test-taker data, and like all our online tests they are capped at 160, because an unsupervised online instrument cannot certify extreme values. For a precise, domain-by-domain result, take the full 50-item battery; for high-stakes purposes such as clinical or educational placement, only an individually administered, professionally supervised test is appropriate.