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The history of IQ tests

Intelligence started to be recorded as the mental age (MA), which can be measured using the IQ test compiled by experts, as a share of the chronological age (CA), i.e. the age of a person as given by the calendar.

About IQ tests

From head to toe - Comprehensive tests, of which the measurement of the intelligence quotient is a mere fraction, will thoroughly test you.

About IQ tests

Why are there so many tests that always deliver different IQ scores? The great demand for intelligence tests means that assorted IQ-test imitations have sprung up.