Abstract
The Wechsler-Bellevue Intelligence Scale (WBIS) is a widely-used psychological test developed to assess general intelligence in adults. This article provides an overview of the WBIS, its development, and its administration and scoring procedures. Results from research studies are discussed and the implications of the WBIS as a tool for measuring intelligence are considered.
Introduction
The Wechsler-Bellevue Intelligence Scale (WBIS) was developed in 1938 by David Wechsler, and is one of the most widely used intelligence tests for adults. It is an individualized test designed to measure intellectual ability in the areas of verbal comprehension, perceptual organization, and working memory. The WBIS is also used to identify individuals with intellectual disabilities or learning difficulties.
Development
The WBIS was first developed by Wechsler in 1938 to assess general intelligence in adults. It was based on the earlier version of the Wechsler-Bellevue Scale, which was developed in 1930. Since then, the WBIS has undergone several revisions, including the Wechsler Adult Intelligence Scale (WAIS) in 1955 and the Wechsler Adult Intelligence Scale-Revised (WAIS-R) in 1981.
Administration and Scoring
The WBIS is typically administered one-on-one in a quiet setting. It consists of a series of verbal and performance subtests that take an average of two hours to complete. The results are scored using a standard formula to obtain a total score, and subscale scores in the areas of verbal comprehension, perceptual organization, and working memory.
Results
Research studies have found that the WBIS is a reliable measure of intelligence, with an internal consistency of .90 or higher. It is also a valid measure of intelligence, with good correlations between the WBIS and other intelligence tests, such as the WAIS-R.
Implications
The WBIS is a valuable tool for assessing general intelligence in adults. It can be used to identify individuals with intellectual disabilities or learning difficulties, as well as to assess the cognitive abilities of adults in research studies.
Conclusion
The Wechsler-Bellevue Intelligence Scale is a widely-used psychological test that is designed to measure general intelligence in adults. It has been found to be a reliable and valid measure of intelligence, and has numerous applications in research and clinical settings.
References
Wechsler, D. (1938). The Wechsler-Bellevue Intelligence Scale. New York: The Psychological Corporation.
Wechsler, D. (1955). The Wechsler Adult Intelligence Scale. New York: The Psychological Corporation.
Wechsler, D. (1981). Wechsler Adult Intelligence Scale-Revised. New York: The Psychological Corporation.
Lambert, N. M., & McCrae, R. R. (1992). The validity of Wechsler’s Adult Intelligence Scale-Revised. Psychological Assessment, 4(2), 77-86.
Kaufman, A. S., & Lichtenberger, E. O. (2006). Assessing adolescent and adult intelligence (3rd ed.). Hoboken, NJ: John Wiley & Sons.