Wechsler Adult Intelligence Scale
He is a critical figure in the early testing of intelligence one of which includes Wechsler Scales of Intelligence which is still widely used around the world (Groth-Marnat, 2003).
He proposed two scales one of which called the Wechsler Adult Intelligence Scale (WAIS) in 1955. Currently, the most updated test is Wechsler Adult Intelligence Scale- Fourth Edition (WAIS-IV) which was published in 2008 by Pearson. Since Wechsler believes that intelligence is multifaceted, he divided the test into two types of skills; verbal and performance abilities and then using the statistical way of factor analysis to decide particular skills within these two major field. WAIS-IV is intended for adults aged from 16 to 90 years old and it is an individually administered test (Spies et al., 2010).
The test includes 10 core subtests and five supplemental subtests. It provides four major scores consists of Verbal Comprehension Index (VCI), Perceptual Reasoning Index (PRI), Working Memory Index (WMI) and Processing Speed Index (PSI). Additionally, it also provides two overall summary scores which is Full Scale IQ and General Ability Index (GAI). The test takes 59 - 100 minutes to complete (Spies et al., …show more content…
Many researches uses IQ testing to interpret and decide high stake decisions. One such example is interpreting future potential for cognitive ability from a current IQ score which may be misleading. IQ testing has been a well-known theory for many decades. It has created many belief systems and expectations about the capabilities of an individual and others. IQ tests have become more instrumental instead of regarding it as an assessment and development of human intelligence alone (Richardson,