Wechsler Scale III VS Old Versions of Wechsler Adult Intelligence Scale1- Addition of three subtests 2- An alternative model for Wechsler adult intelligence scale scoring 3- Expanding the normative samples 4- Inclusion of easy items 5- Extended subject range to the age of 89 years 6- Co-norming with Wechsler Memory Scale, and 7- More keen to assess mentally retarded people Here you will read about the two most important developments; addition of sub-tests and alternative model for the test scoring. Addition of Sub-Tests in the Wechsler Scale III
David Wechsler defines intelligence as your “aggregate or global capacity to act purposefully, to think rationally and to deal effectively with” your environment. He takes your ability to do something as expression of your level of intelligence. He, in 1939, selected those areas in Wechsler adult intelligence scale test that could represent a wide range of your underlying abilities. The Wechsler adult intelligence scale test III has further increased the area by developing 14 subtests. One sub-test (Object Assembly) is optional and is used rarely under specific circumstances. The 11 sub-tests are used to measure your conventional I.Q, with the standard deviation of 15 points. These are traditionally divided into two groups to score the Wechsler Scale as: Verbal IQ Testing • Vocabulary • Arithmetic • Information • Comprehension • Digit Span • Similarities
Performance IQ Testing • Picture completion • Picture Arrangement • Block Design • Digit Symbol-Coding • Matrix Reasoning
Alternative model of Scoring for Wechsler Adult Intelligence Scale TestVerbal Comprehension • Vocabulary • Similarities • Information This index of the Wechsler Scale has excluded those sub-tests which required sensitivity of your attention like digit span, arithmetic reasoning etc. It can measure your verbal comprehension better than ever in the past. Perceptual Organization • Picture Completion • Block Design • Matrix Reasoning How do you organize things in your perceptions? It is a performance group with more specific inclusions. Speed loses its importance as at least one sub-test, matrix reasoning, is not time limited. Other sub-tests have also relaxed the candidates to some extent. It is considered more refined measure of your fluid reasoning and your visual-spatial problem solving capability. Working Memory • Arithmetic • Digit Span • Letter- Number Sequencing This group of the Wechsler adult intelligence scale test is comprised of the sub-tests sensitive to your attention and immediate memory. Your lower score in this area may qualify you as having some problem with your attention and memory. For screening purposes you need to prepare this part better than any other sub-test in the Wechsler Scale III. Processing Speed • Digit Symbol Coding • Symbol Search How quickly you may solve the problems? Decision making becomes an art when is combined with the right information and quickness to the situation. Your decisions after the right moment passes may fire back. This section of the Wechsler Scale measures your quickness to solve the problems. It is a highly-time section and you are expected to answer with speed and correctness. Besides screening purpose this group of sub-tests may be used to identify various neurological and neuropsychological conditions.
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