IQ Full Form is Intelligence Quotient. Intelligence quotient (IQ) is a number used to express a person's intelligence. The abbreviation is “IQ”. It is the total score gained from a set of standardised measures developed to calculate a person's intelligence.
Psychologist William Stern invented the phrase “IQ” for the German Word “Intelligenzquotient.” Alfred Binet and Theophile Simon in 1905 introduced the first intelligence test.
IQ was initially calculated by taking the ratio of mental age to physical age and multiplying by100.
For example : If a 20 year man has a mental age of 30 ,his IQ would be 3020 100. = 150.
Many tests determine the IQ of a person. The value derived from the test determines the intelligence of an individual. An individual's IQ can be measured from one of the many tests developed for gathering data.
IQ tests help to measure the reasoning level of an individual.
It helps teachers to understand whom to be given additional attention to.
Companies adopt this to select the right candidate capable of thinking out of the box.
It helps to form an idea about memory of an individual
It helps to assess problem solving skills.
IQ tests are designed to have an average score of 100. An upward and downward difference of 15 IQ scores is set . Almost 68% of individuals have an IQ between 85 to 100. It varies from country to country,scenario to scenario. IQ score is influenced by various environmental factors like-
Quality education
Proper nutrition
Low level of contagious diseases
Socio economic factor
IQ tests involve an array of questions to assess an individual's reasoning capacity and problem-solving skill. Some of the widely used IQ tests are-
Wechsler Intelligence Scale for Children (WISC - V)
Wechsler Intelligence Scale for Adults (WAIS)
Stanford - Binet Intelligence Scale
Differential Ability Scales (DAS)
Peabody Individual Achievement Test.
Intelligence Quotient
Psychologist William Stern
100
Alfred Binet and Theophile Simon
Taking the ratio of Mental age to Chronological age and Multiplying by 100.