Wechsler adult intelligence scale 4th edition
WAIS-IV Wechsler Adult Intelligence Scale-4th Edition: Administration and Scoring Manual by David WechslerDavid Wex Wechsler (January 12, 1896 – May 2, 1981) was a leading American psychologist. He developed well-known intelligence scales, such as the Wechsler Adult Intelligence Scale (WAIS) and the Wechsler Intelligence Scale for Children (WISC).
Wechsler was born in a family in Lespezi, Romania, and immigrated with his parents to the United States as a child. He studied at the City College of New York and Columbia University, where he earned his masters degree in 1917 and his Ph.D. in 1925 under the direction of Robert S. Woodworth. During World War I he worked with the United States Army to develop psychological tests to screen new draftees while studying under Charles Spearman and Karl Pearson.
After short stints at various locations (including five years in private practice), Wechsler became chief psychologist at Bellevue Psychiatric Hospital in 1932, where he stayed until 1967. He died in 1981, his psychological tests already being highly respected.
Wechsler is best known for his intelligence tests. He was one of the most influential advocates of the role of nonintellective factors in testing. He emphasized that factors other than intellectual ability are involved in intelligent behavior. Wechsler objected to the single score offered by the 1937 Binet scale. Although his test did not directly measure nonintellective factors, it took these factors into careful account in its underlying theory. The Wechsler Adult Intelligence Scale (WAIS) was developed first in 1939 and then called the Wechsler-Bellevue Intelligence Test. From these he derived the Wechsler Intelligence Scale for Children (WISC) in 1949 and the Wechsler Preschool and Primary Scale of Intelligence (WPPSI) in 1967. Wechsler originally created these tests to find out more about his patients at the Bellevue clinic and he found the then-current Binet IQ test unsatisfactory. The tests are still based on his philosophy that intelligence is the global capacity to act purposefully, to think rationally, and to deal effectively with [ones] environment (cited in Kaplan & Saccuzzo, p. 256).
The Wechsler scales introduced many novel concepts and breakthroughs to the intelligence testing movement. First, he did away with the quotient scores of older intelligence tests (the Q in I.Q.). Instead, he assigned an arbitrary value of 100 to the mean intelligence and added or subtracted another 15 points for each standard deviation above or below the mean the subject was. While not rejecting the concept of global intelligence (as conceptualized by his teacher Charles Spearman), he divided the concept of intelligence into two main areas: verbal and performance (non-verbal) scales, each evaluated with different subtests.
The WAIS is today the most commonly administered psychological test (Kaplan & Sacuzzo, 2009). The tests are currently updated approximately every ten years to compensate for the Flynn effect.
Wechsler Adult Intelligence Scale | Fourth Edition
This instruments aids in examining the relationship between intellectual functional and memory. A common purpose for the WAIS is for educational planning and placement with older adolescents and adults. The test includes 11 subtests with various types of format. Approximately 60 to 90 minutes is required for completion. The Wechsler Adult Intelligence is a well-established scale and it has fairly high consistency.
For more than 50 years, the Wechsler IQ test has been administered to find the intellect of adults and children alike. This intelligence test is one of the most widely used in the evaluation of both children and adults. David Wechsler , renowned psychologist, is responsible for creating this examination. Wechsler is a Romanian-American psychologist who was born on Jan 12, , in Romania. His family relocated to the states in New York when he was just a boy. By , his further delve into education earned him a Ph.
This test was composed of elements of other intelligence tests such as the Binet-Simon scale which was the precursor to the Stanford-Binet Intelligence Scale., The current Wechsler scales for assessing the intelligence of adults Wechsler Adult Intelligence Scale — 4th ed. The very first test published by Dr.
Data collection for the next version WAIS 5 began in and is expected to end in spring However, these individual elements were not entirely independent, but were all interrelated. His argument, in other words, is that general intelligence is composed of various specific and interrelated functions or elements that can be individually measured. This theory differed greatly from the Binet scale which, in Wechsler's day, was generally considered the supreme authority with regard to intelligence testing. A drastically revised new version of the Binet scale, released in , received a great deal of criticism from David Wechsler after whom the original Wechsler—Bellevue Intelligence scale and the modern Wechsler Adult Intelligence Scale IV are named. These criticisms of the Binet test helped produce the Wechsler—Bellevue scale, released in