Intelligence Tests The intelligence test measures the mental alertness of the individual.

To the writer the intelligence test measures the ability to learn and to retain what is learned.

Possibly, in an indirect way, it is a measure of the chemical changes that take place in the brain which account for learning and retention.

Psychologists are pretty well agreed that the capacity which is measured is innate and is very little affected by education or experience.

The most famous intelligence test is that of Binet and Simon, two French psychologists, who first published their test in 1908.