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The Stanford–Binet Intelligence Scales (or more commonly the Stanford–Binet) is an individually administered intelligence test that was revised from the original Binet–Simon Scale by Alfred Binet and Théodore Simon. It is in its fifth edition (SB5), which was released in 2003.
Children with an IQ above 140 by that test were included in the study. There were 643 children in the main study group. When the students who could be contacted again (503 students) were retested at high school age, they were found to have dropped 9 IQ points on average in Stanford–Binet IQ.
Alfred Binet (/ b ɪ ˈ n eɪ /; French:; 8 July 1857 – 18 October 1911), born Alfredo Binetti, was a French psychologist who together with Théodore Simon invented the first practical intelligence test, the Binet–Simon test. [2]
The Binet-Simon Intelligence Test was the first intelligence test that could be used to predict scholarly performance and which was widely accepted by the fields of psychology and psychiatry. [ 2 ] [ 3 ] [ 4 ] The development of the test started in 1905 with Alfred Binet and Théodore Simon in Paris, France.
An intelligence quotient (IQ) is a total score derived from a set of standardized tests or subtests designed to assess human intelligence. [1] Originally, IQ was a score obtained by dividing a person's mental age score, obtained by administering an intelligence test, by the person's chronological age, both expressed in terms of years and months.
For IQ tests, a qualifying score corresponds to an IQ of at least 146 for tests with standard deviation of 15 (e.g., WAIS, Stanford–Binet 5), at least 149 for tests with a standard deviation of 16 (e.g., Stanford–Binet IV and CTMM), or at least 173 for tests with a standard deviation of 24 (e.g., Cattell III-B). [14]
An individual's "deviation IQ" is then estimated, using a more complicated formula or table, from their score's percentile at their chronological age. But at least as recently as 2007, older tests using ratio IQs were sometimes still used for a child whose percentile was too high for this to be precise, or whose abilities may exceed a deviation ...
The g factor [a] is a construct developed in psychometric investigations of cognitive abilities and human intelligence.It is a variable that summarizes positive correlations among different cognitive tasks, reflecting the assertion that an individual's performance on one type of cognitive task tends to be comparable to that person's performance on other kinds of cognitive tasks.