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Intelligence

INFERA Nonverbal Intelligence Test.

A nonverbal reasoning test of 24 matrices. Each matrix is a grid of nine squares with one missing, and you choose the piece that belongs in it. No reading, no time limit.

Time
10 to 15 min
Questions
24

Instructions

You will be shown 24 pictures. Each picture shows a grid of nine squares. Eight are filled in and the bottom right one is empty. Choose the option below the grid that belongs in the empty square. There is no time limit, so take as long as you need on each one. The test usually takes 10-15 minutes. The INFERA matrices are copyright Psychology Me Ltd and confidential. Do not copy, screenshot, share or publish them.

What to expect

Scientifically validated
Based on established psychological research
Private results
Your data is secure and private
Detailed results
Comprehensive insights and recommendations

About the Nonverbal Intelligence Test

INFERA is the nonverbal intelligence test built by Psychology Me. It has 24 picture matrices. Each one is a grid of nine squares in which the bottom-right square is empty, and you choose, from six or eight options, the piece that belongs there. There is no time limit, and most people finish in 10 to 15 minutes.

The matrices contain no words, so you do not need to read to answer them; only the short instructions are text. Your number of correct answers is placed on the familiar IQ scale (mean 100, standard deviation 15) by comparing it with the results of other people. Your free result shows whether you scored below average, within the average range, or above average; the IQ-scale estimate, its percentile and the range it is likely to fall in come with the detailed report.

Items
24
Duration
10 to 15 min
Format
Picture matrices: a 3x3 grid with one square missing, six or eight options per item
Free result
Whether you scored below average, within the average range, or above average, free after completion
Full report
A detailed report with your IQ-scale estimate, percentile and 90% range, and what your result does and does not indicate (free with an account)

What it measures

INFERA measures nonverbal reasoning, often called fluid reasoning: working out the rule that links a set of figures and applying it to a case you have not seen before. From one square to the next, figures may change in shape, number, shading or position; harder matrices combine more than one rule, and some rules involve counting or adding elements across a row. A strong result means these rules came readily to you on the day you took the test.

INFERA reports one overall score rather than separate sub-scores. It does not measure vocabulary, general knowledge, memory or creativity, and on its own it is not a full assessment of intelligence.

The science and validity

Matrix reasoning is one of the best-studied ways to measure fluid intelligence, and it relates strongly to the general factor of cognitive ability, g. Tests in this format have been used for decades because their rules can be made progressively harder without relying on language.

INFERA is an original set of matrices developed by Psychology Me, and its 24 items run from easy to hard. Your number of correct answers is converted to an IQ-scale estimate and a percentile, which compare you with other people. Every score carries measurement error, so the detailed report shows a 90% range around your estimate rather than a single exact figure, and shows the IQ as a whole number.

References

  1. Carpenter, P. A., Just, M. A., & Shell, P. (1990). What one intelligence test measures: A theoretical account of the processing in the Raven Progressive Matrices Test. Psychological Review, 97(3), 404-431.
  2. Raven, J. (2000). The Raven's Progressive Matrices: Change and stability over culture and time. Cognitive Psychology, 41(1), 1-48.
  3. Deary, I. J. (2012). Intelligence. Annual Review of Psychology, 63, 453-482.
  4. Jensen, A. R. (1998). The g factor: The science of mental ability. Praeger.

Read more about our standards: How our tests are built and validated.

Sample items

  • A grid of nine squares with the bottom-right square empty: the figures change in a regular way along each row; choose, from the options below it, the piece that continues the pattern.The basic matrix format. This describes the format; it is not an item from the test.
  • A grid in which both the number and the position of the elements change at once - find the piece that fits both rules.Harder matrices combine two rules.

Frequently asked questions

Is INFERA free?

Yes. Taking the test is free, with no account required to start, and your free result shows whether you scored below average, within the average range, or above average. The full report, free with an account, adds your IQ-scale estimate, its percentile and the range it is likely to fall in, plus an interpretation of what your result does and does not indicate.

Is there a time limit?

No. INFERA has no time limit, so you can take as long as you need on each matrix. Most people finish in 10 to 15 minutes. Take it in one quiet sitting for the most representative result.

Do I need to read or know English?

The matrices contain no words, so you do not need to read to answer them. Only the short instructions are text, available in English and Montenegrin.

What score will I get?

The detailed report gives an IQ-scale estimate (mean 100, standard deviation 15) as a whole number, the matching percentile and a 90% range around the estimate, plus a broad band from well below average to well above average. The comparison is with the results of other people.

Can I take it again?

With an account, you can take INFERA again six months after your last scored attempt. Retaking it sooner would mostly measure familiarity with the matrices rather than your reasoning.

Is INFERA a clinical or diagnostic test?

No. INFERA is a non-diagnostic measure of nonverbal reasoning. It is not a clinical, educational or selection assessment, and it cannot diagnose a learning difficulty or an intellectual disability. For those questions, speak with a qualified psychologist.

Who made INFERA?

INFERA is Psychology Me's own test. The matrices were designed for this platform and are confidential, so they are not published or shared.

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Created and reviewed to professional scientific standards. See how our tests are built and validated.