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William Stern

Alfred Binet

Binet-Simon Scale

David Wechsler

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The first IQ test involved lot of factors which were considered. For example morbidity, mortality, social status, even your parents IQ. The heritability of IQ for example, is a sphere with plenty of unclear fields – there are no sharp pointed mechanisms which are able to describe the process of heritability. Although we gave a credit to William Stern for generalization of the personalistic psychology, we should say some words about his inspiration – the work and research of Alfred Binet. You can even read in some articles that he is the inventor of the IQ test. Well the difference between them is that Alfred Binet made the first IQ test, but orientated only for children. The nowadays IQ tests are based on the William Stern generalization of that field.The first IQ test writer -  Alfred Binet

During the early 1900s, the French government asked psychologist Alfred Binet(July 11, 1857 – October 18, 1911)  and his colleague Theodore Simon (1872–1961) 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. His aim was to test each of the children and value their memory skills, attention skills and problem-solving skills.He quickly realized that some children were able to answer more advanced questions that 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.

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