Q&A

Is the WAIS-IV reliable and valid?

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Is the WAIS-IV reliable and valid?

The reliability and validity of the WAIS-IV is outlined in the Technical and Interpretive Manual [1]). The main reliability figure based on the standardisation sample for Full Scale IQ was 0.98, indicating good internal consistency.

What is the average IQ score on the WAIS-IV?

100
On the WAIS, Wechsler instead compared scores of the test-taker to those of others in his or her general age group. The average score is fixed at 100, with approximately two-thirds of all scores falling somewhere between 85 and 115.

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What is the highest score you can get on the WAIS-IV?

These scores range from the lowest (40) to the highest (160) points. Subtests are given for additional examination of processing abilities.

What is the most valid IQ test?

Wechsler Adult Intelligence Scale
The most commonly used individual IQ test series is the Wechsler Adult Intelligence Scale (WAIS) for adults and the Wechsler Intelligence Scale for Children (WISC) for school-age test-takers.

Is the Wechsler IQ test valid?

Is the Test Really Reliable? Research has shown that the Wechsler test is one of the most well-designed tests to measure intelligence. It provides a wide profile of indexes and scales and really allows for the diagnosis of certain mental complications, as well as an accurate depiction of a person’s intelligence.

What is WAIS diagnosis?

The Wechsler Adult Intelligence Scale (WAIS) is an IQ test designed to measure intelligence and cognitive ability in adults and older adolescents.

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What is the WAIS IQ test?

The Wechsler Adult Intelligence Scale (WAIS) is an IQ test designed to measure intelligence and cognitive ability in adults and older adolescents. It is currently in its fourth edition (WAIS-IV) released in 2008 by Pearson, and is the most widely used IQ test, for both adults and older adolescents, in the world.

What is a good IQ level for WAIS-IV?

WAIS-IV IQ LEVELS, DESCRIPTIVE CLASSIFICATION AND PERCENTILE RANK IQ Level Descriptive Classification Percentile 130+ Very Superior 98 – 99.9 120 to 129 Superior 91 – 97 110 to 119 High Average 75 – 90 90 to 109 Average 25 – 73 80 to 89 Low Average 9 – 23 70 to 79 Borderline 2 – 8

What is the prorated sum of the WAIS-IV scores?

The prorated sum is 187.3, remarkably close to the 186 he actually obtained on the 10 core subtests. Prorating works! Unfortunately, the WAIS-IV assigns all sum of scaled scores of 181 or higher, an IQ of 160. however we can estimate, from the roughly linear relationship between sum of scaled scores and IQ, that he is above 160.

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What does the WAIS-IV measure?

Wechsler Adult Intelligence Scale-IV DESCRIPTION OF WAIS-IV INDEXES Verbal Comprehension Index This index reflects an individual’s ability to understand, use and think with spoken language. It also demonstrates the breadth and depth of knowledge acquired from one’s environment. It measures the retrieval from long-term memory of such information.

What is the full-scale IQ of a person with an IQ of 160?

Prorating works! Unfortunately, the WAIS-IV assigns all sum of scaled scores of 181 or higher, an IQ of 160. however we can estimate, from the roughly linear relationship between sum of scaled scores and IQ, that he is above 160. From here we can deduce that full-scale IQ = 0.697057 (sum of scaled scores) + 31.533486.