The WAIS-IV is an exceptionally well-constructed, psychometrically robust measure of adult intellectual functioning. Its four-index structure provides clinically actionable profiles. However, it is long, culturally loaded, and expensive. For most clinical psychologists and neuropsychologists, it remains the tool of choice when a comprehensive, defensible assessment of IQ is required. For brief screening or specific populations (non-English speakers, severe motor deficits), consider alternatives.
This review covers its purpose, structure, theoretical strengths, clinical utility, psychometric properties (reliability/validity), limitations, and practical considerations for anyone considering or interpreting this test. The WAIS-IV (published by Pearson, 2008) is the gold-standard instrument for assessing intellectual ability in adults aged 16:0 to 90:11 years . It measures current intellectual functioning (IQ) across multiple cognitive domains, replacing the WAIS-III. wais-iv test
Would you like a summary of the or a comparison with the upcoming WAIS-V (expected release 2025–2026)? The WAIS-IV (published by Pearson, 2008) is the
| Index | What it measures | Core Subtests | Supplemental | |--------|----------------|---------------|---------------| | | Verbal reasoning, word knowledge, concept formation | Similarities, Vocabulary | Information, Comprehension | | Perceptual Reasoning Index (PRI) | Non-verbal, fluid reasoning, visual-spatial processing | Block Design, Matrix Reasoning, Visual Puzzles | Figure Weights, Picture Completion | | Working Memory Index (WMI) | Attention, mental manipulation, short-term auditory memory | Digit Span, Arithmetic | Letter-Number Sequencing | | Processing Speed Index (PSI) | Visual scanning, motor speed, graphomotor output | Symbol Search, Coding | Cancellation | concept formation | Similarities