The full form of IQ is Intelligence Quotient.
An intelligence quotient (IQ) is the total score obtained from a set of standardized tests or sub-tests designed to assess human intelligence.
IQ was a score obtained by dividing an individual’s mental age score, which was obtained by administering an IQ test, by the individual’s chronological age. The quotient was multiplied by 100 to get the IQ score. Both were expressed as years and months.
For modern IQ tests, the raw score is transformed to a normal distribution with a mean of 100 and a standard deviation of 15.
This results in approximately two-thirds of the population scoring between IQ 85 and IQ 115 and about 2.5 percent each above 130 and below 70.
History of IQ
The acronym “IQ” was invented by the psychologist William Stern for the German term Intelligenzquotient. The word he proposed in a book published in 1912 for a rating system for IQ tests at the University of Breslau.
Intelligence Quotient (IQ) scores are used for
- Educational placement
- Assessment of intellectual disability
- Evaluating job applicants
Importance of Intelligence Quotient (IQ)
- IQ test helps to understand the individuals reasoning capacity It seeks to analyze how well individuals can use knowledge and technology to respond and predict.
- It allows gathering insights about the candidates’ memory.
- IQ tests can help teachers know which students require additional care.
- Various companies also carry out the test to select their staff.
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