The Wechsler Adult Intelligence Scale® Fourth Addition for South Africa (WAIS®-IV SA) is the most advanced adult measure of cognitive ability, based on recent research in the area of cognitive neuroscience and the theories and work of David Wechsler PhD. The WAIS-IV SA was adapted to provide South African psychology professionals with a comprehensive measure of adult intelligence that can be used for a variety of psychological purposes; from forming part of a selection battery to determine an individual’s ability to qualify for special services, to identification and treatment of psychological disability.