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IQTI - Intelligence Test Index
The Intelligence Quotient Test Index or IQTI consists of more then 100 supervised and high range IQ tests. Only IQ test scores that have been verified are listed at the IQTI. The IQTI will not tolerate self scored tests or falsified test results. If you are a test designer and you want your test listed at IQTI, please contact IQTI via the e-mail address below.
Send your test scores to iqtestindex@yahoo.com
History of the IQ test
During the early 1900s, the French government asked psychologist Alfred Binet to help decide which students were mostly likely to experience difficulty in schools. The government had passed laws requiring that all French children attend school, so it was important to find a way to identify children who would need specialized assistance.
Faced with this task, Binet and his colleague Theodore Simon began developing a number of questions that focused on things that had not been taught in school such as attention, memory and problem-solving skills. Using these questions, Binet determined which ones served as the best predictors of school success. He quickly realized that some children were able to answer questions that were more advanced than older children were generally able to answer, while other children of the same age were only able to answer questions that younger children could typically answer. Based on this observation, Binet suggested the concept of a mental age, or a measure of intelligence based on the average abilities of children of a certain age group.
This first intelligence test, referred to today as the Binet-Simon Scale, became the basis for the intelligence tests still in use today. In 1916, at Stanford University, the psychologist Lewis Terman released a revised examination which became known as the "Stanford-Binet test". WAIS was initially created as a revision of the Wechsler-Bellevue Intelligence Scale (WBIS), which was a battery of tests published by David Wechsler in 1939.
The Flynn Effect
In his study of IQ tests scores for different populations over the past sixty years, James R. Flynn discovered that IQ scores increased from one generation to the next for all of the countries for which data existed (Flynn, 1994). This interesting phenomena has been called "the Flynn Effect." Many of the questions about why this effect occurs have not yet been answered by researchers.
The Flynn Effect
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Wechsler-Bellevue Test (3rd edition)
