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IQ Tests


The most famous, and perhaps most respected, IQ test is the Wechsler Adult Intelligence Scale (WAIS). The WAIS was based on the Wechsler Bellevue Intelligence Scale, which was first published by David Wechsler in 1939. Now in its third edition the WAIS, and other tests like it, are clinical tools that are used for diagnostic purposes. They are complex to score, and have to be administered in a face-to-face setting. IQ tests are only available for use by Clinical and Educational Psychologists and, as such, are not routinely used for occupational assessment (but may occasionally be used for occupational guidance and counselling purposes).


IQ tests, such as the WAIS, have contributed to our understanding of a range of clinical problems, including; Alzheimer’s disease, head injuries and schizophrenia. They are still routinely used to assess the effects of head injuries, and to assess specific educational problems, such as dyslexia.








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