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- Glossary
Intelligence quotient
A measure intended to express a person's intellectual capacity. Tests designed to determine intelligence are based on the concept that there is a general factor of intelligence that is normally distributed across the population. The first IQ tests were developed in the early 20th century by Alfred Binet, who wanted to use them to determine the relative intelligence age of schoolchildren. According to his definition, IQ is the quotient of intelligence age and chronological age multiplied by 100. This is also the average IQ of a person. Modern tests often use standard deviations for normalization, which means that IQ is still scaled to average = 100, SD = 15, without directly calculating intelligence age. 95 percent of the population has IQ scores between 70 and 130. If someone scores below 70, they are considered to have intellectual disability, while a score above 130 is considered gifted.
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Glossar
15.03.2017
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- Acting
- Motor Skills
Forced Right-Handedness
When left-handed people were retrained to use their right hand, their brains were also retrained.
25.10.2025
