What are the 6 indexes on the WAIS-IV?

What are the 6 indexes on the WAIS-IV?

Index scores and scales Verbal Comprehension Index (VCI) Perceptual Reasoning Index (PRI) Working Memory Index (WMI) Processing Speed Index (PSI)

What are the index scores on the WAIS-IV?

There are four index scores representing major components of intelligence: Verbal Comprehension Index (VCI) Perceptual Reasoning Index (PRI) Working Memory Index (WMI)

How do you interpret WAIS-IV score?

Perceptual Reasoning Index (PRI) – reflects an individual’s ability to accurately interpret, organize and think with visual information….Score Interpretation of WAIS IV and MMPI II.

Full Scale IQ Percentile Range Classification
120 to 129 91 to 97 Superior
110 to 119 75 to 90 High Average
90 to 109 25 to 73 Average
80 to 89 9 to 23 Low Average

What is an index score WAIS?

The GAI is an optional index score for the WISC-IV and the WAIS-IV. • The GAI is derived from the core Verbal Comprehension and Perceptual Reasoning subtests. • The GAI provides an estimate of general intellectual ability, with reduced emphasis on working memory and processing speed relative to the FSIQ.

What are the 10 core subtests of the WAIS?

The WAIS-IV has 10 core subtests (Arithmetic, Block Design, Comprehension, Digit Span, Digit Symbol, Information, Letter-Number Sequencing, Matrix Reasoning, Picture Arrangement, Picture Completion, Processing Speed, Object Assembly, Similarities, Symbol Search, and Vocabulary) which make up four index scores, …

What does the PSI on the WAIS-IV measure?

The Processing Speed Index (PSI) measures the speed of mental processing, using visual stimuli and graphomotor skills, and is related to the efficient use of other cognitive abilities.

What is a good score on the WAIS?

The average score for the test is 100, and any score from 90 to 109 is considered to be in the average intelligence range. Score from 110 to 119 are considered to be High Average. Superior scores range from 120 to 129 and anything over 130 is considered Very Superior.

What does arithmetic measure on the WAIS?

The Arithmetic subtest score measures attention, concentration, and numerical reasoning. A large discrepancy between Verbal and Performance scores on the WAIS-R may not indicate a learning disability.

What is a good FSIQ score?

The primary index scores range from 45 to 155; the FSIQ ranges from 40 to 160. For both the primary index scores and the FSIQ, scores ranging from 90 to 109 are typically considered average.

How is WAIS-IV FSIQ calculated?

FSIQ = 25 + 0.75*S where S is the Sum of Scaled Scores. The 100’s are the means of the two distributions and the 15 and 20 are their standard deviations. All of this can be obtained by publically released information.

How many subtests does WAIS-IV have?

The WAIS–IV FSIQ is composed of all 10 subtests that comprise the four index scores, including the Working Memory and Processing Speed subtests.

What format is the WAIS-IV?

The WAIS-IV may be administered in paper-and-pencil or web-based (Q-interactive) format; it can be scored manually or with software. NOTE: Field-based data collection for development of the WAIS-5 is ongoing through 2020.

What types of skills do the WAIS-IV subtests measure?

The WAIS-IV comprises a full scale IQ, as well as indexes on four factors: verbal comprehension, perceptual reasoning, working memory and processing speed.

What does similarities measure on the WAIS?

Similarities measures logical thinking, verbal concept formation and verbal abstract reasoning. Two similar but different objects or concepts are presented, and the student is asked to tell how they are alike or different. Similarities is an untimed core Verbal Comprehension sub-test.


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