Wechsler Adult Intelligence Scale, Fourth Edition Now Available From Pearson
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Wechsler Adult Intelligence Scale, Fourth Edition Now Available From Pearson

The Most Widely Used and Comprehensive Measure of Adult Cognitive Ability Evolves in Recognition of the Changing Landscape of Clinical Psychology

— August 28, 2008 —

 Pearson today announced the availability of the Wechsler Adult Intelligence Scale, Fourth Edition (WAIS®-IV), an assessment of cognitive ability that yields a norm-based score that can be used for a variety of psychological purposes from qualification for special services to identification and treatment of psychological disability.

The WAIS®-IV was revised, based on four years of national and clinical research, to update normative data, strengthen theoretical foundations, reduce administration time, enhance psychometric properties, and improve developmental appropriateness.

“The introduction of the WAIS-IV continues our tradition of raising the bar on intelligence assessments. We have modified it to adapt more easily to day-to-day workflow with reduced administration times and more user-friendly instructions. At the same time, we’ve broadened the assessment’s clinical utility by including new and enhanced subtests, clinical studies and validity studies,” said Carol Watson, president, Clinical Assessment/North America, Pearson. “These enhancements were developed to provide the most advanced measure of cognitive ability and results that psychologists can trust.”

The WAIS®-IV is intended for use with adults ages 16 to 90. The assessment measures cognitive ability using a core battery of 10 unique subtests that focus on four specific domains of intelligence: verbal comprehension, perceptual reasoning, working memory, and processing speed. The WAIS®-IV features a normative sample of 2,200 adults and was stratified by age, gender, education level, ethnicity, and region to provide the highest reliability of results. Thirteen special group studies included in the data were also conducted with specific clinical populations.

WAIS®-IV administration involves the use of two stimulus books, two response booklets, one record form and an administration manual. The assessment is individually administered by a trained psychologist using a combination of verbal and performance tasks. Once completed, the assessment may be hand scored using paper and pencil forms or electronically scored using the new WAIS®-IV Scoring Assistant software which automatically converts raw scores to scaled scores and provides score analysis in the form of tables and graphs. Report Writer software will be available in February 2009 and will provide additional interpretive report capabilities for users.

The WAIS®-IV is based on the theories and work of David Wechsler PhD., who is recognized as one of the most influential and respected psychologists of the 20th century. Dr. Wechsler pioneered the field of cognitive psychology beginning with the publication of the Wechsler-Bellevue Intelligence Scale in 1939. He later evolved this measure into the Wechsler Adult Intelligence Scale, WAIS (1955), Wechsler Intelligence Scale for Children, WISC (1949) Wechsler Memory Scale, WMS (1945), and Wechsler Pre-School and Primary Scale of Intelligence, WPPSI (1967). Dr. Wechsler’s work has continued through the revision and publication of his original measures by Pearson, which has sought to maintain his philosophy that intelligence is "the global capacity to act purposefully, to think rationally, and to deal effectively with [one's] environment." Since its inception, the WAIS® has been translated and/or adapted for use and is available in over 20 languages and countries.

To learn more about the WAIS®-IV or to place an order; please call 1-800-211-8378 or visit www.wais-iv.com

About Pearson

Pearson is the global leader in clinical assessment, providing a wide range of assessments for personality, behavior, ability, achievement, speech and language, and career interest. Our respected brands include the Wechsler family of assessments, the MMPI family of tests, the Beck inventories, the Millon inventories, the PPVT-4, the Bayley Scales of Infant and Toddler Development, the BASC family of products and the Kaufman family of assessments. Pearson’s other primary businesses include the Financial Times Group and the Penguin Group.