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IQ Overview

3d stacked cubes

IQ stands for intelligence quotient and is a mental capability score that is determined by the ability to reason, solve problems, think abstractly, and recognize patterns such as the relationships of elements in a configuration.

Types of Intelligence

Fluid Intelligence includes such abilities as problem-solving, memory, learning, and pattern recognition.

Crystallized Intelligence is more static, consisting primarily of acquired knowledge.

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Measure multiple areas of cognitive ability.

History of IQ Tests


The IQ test as we know today began with the Stanford-Binet test. Theodore Simon and Alfred Binet devised the IQ test in 1905. Their post test analysis was used to indicate a need for more teaching and didn't necessarily imply an inability to learn. This philosophy is still held today with professionals and researchers.

IQ, an abbreviation for "intelligence quotient", is a score used to measure general cognitive ability derived from a set of standardized tests. It is expressed as a number normalized so that the average IQ in an age group is 100 -- in other words an individual scoring 115 is above-average when compared to similarly aged people. The distribution of IQ scores is more-or-less Gaussian, that is it follows the famous "bell curve".

Example Quiz
Complete the sequence by filling in the last shape (circled in red).
example iq problem