For more than 50 years, the Wechsler IQ test has been administered to find the intellect of adults and children alike. This intelligence test is one of the most widely used in the evaluation of both children and adults. The current version of the adult test, the Wechsler Adult Intelligence Scale (WAIS), is in the fourth edition (i.e. WAIS-IV).
The most recent version of the Wechsler test, version number 4, was released in 2008. Close to 70 per cent of the population would fall within one standard deviation of the test scale, putting them at an IQ test score of between 85 and 115. You can learn more about the IQ test scale here.
The Wechsler Adult Intelligence Scale (WAIS) is an IQ test designed to measure intelligence and cognitive ability in adults and older adolescents. The original WAIS (Form I) was published in February 1955 by David Wechsler, as a revision of the Wechsler–Bellevue Intelligence Scale, released in 1939.ICD-9-CM: 94.01.