What age does a childs performance on an intelligence test stabilize?
At what age IQ is fixed?IQ is set at around 20-years-old and later effort will not improve it much, recent research finds. The complexity of people's jobs, higher education, socialising and reading all probably have little effect on cognitive ability.
What is the IQ of a 10 years old child whose mental age is 12 years?Thus, if a 10-year-old child had a mental age of 12 (that is, performed on the test at the level of an average 12-year-old), the child was assigned an IQ of 12/10 × 100, or 120.
What intelligence test is used for children?The Wechsler Intelligence Scale for Children is the most widely used test of intelligence for children aged 6 through 16 years. There are currently two different editions of the WISC.
Who measured a childs mental age?Mental age was first defined by the French psychologist Alfred Binet, who introduced the intelligence test in 1905, with the assistance of Theodore Simon. Binet's experiments on French schoolchildren laid the framework for future experiments into the mind throughout the 20th century.
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