3)įollowing the decision to concentrate the assessment of adult intelligence into a separate test, the WAIS (1955), WAIS-R (1981), and WAIS-III (1997) were published by the Psychological Corporation (now Pearson Assessment) and quickly embraced by both research and practicing psychologists as reliable and clinically useful assessment instruments. Intelligence is the aggregate or global capacity of the individual to act purposefully, to think rationally and to deal effectively with his environment. Wechsler passed away in 1981, his legacy continues in the many intelligence, memory, and achievement tests that carry his name. Progressing from the original WB are the now well-known Wechsler intelligence scales noted above as well as other tests that carry the Wechsler name, for example, the Wechsler Individual Achievement Test, Wechsler NonVerbal Scale of Ability, the Wechsler Abbreviated Scale of Intelligence, and the Wechsler Memory Scales, now in its 4th edition. The most significant change was the splitting of the Full-Scale Intelligence Quotient (FSIQ) to yield a Verbal (VIQ) and Performance (PIQ) intelligence quotient. David Wechsler in 1939 was the Wechsler–Bellevue Intelligence Scale (WB) that introduced several major changes to the field of intellectual assessment that had been dominated by the well-established Stanford–Binet test, first published at the turn of the twentieth century in France. WAIS-IV), school-age children (Wechsler Intelligence Scale for Children – 4th ed WISC-IV), and preschool and young children (Wechsler Preschool and Primary Scale of Intelligence – 3rd ed WPPSI-III) have a long and distinguished history. The current Wechsler scales for assessing the intelligence of adults (Wechsler Adult Intelligence Scale – 4th ed.
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