The Wechsler Full Scale IQ is a measure of general intelligence that is derived from several subtests of the Wechsler Adult Intelligence Scale (WAIS) or Wechsler Intelligence Scale for Children (WISC). It provides an overall assessment of an individual's cognitive abilities, including verbal comprehension, perceptual reasoning, working memory, and processing speed. The Full Scale IQ score is a standardized score with a mean of 100 and a standard deviation of 15.