Based on the world's most widely administered intelligence assessment. Measures 4 cognitive index scales used in clinical, educational, and forensic settings worldwide.
The Wechsler Adult Intelligence Scale (WAIS) is the most widely used individually administered intelligence test for adults. Now in its 4th edition (WAIS-IV), it provides Full Scale IQ (FSIQ) and four index scores that together paint a comprehensive picture of cognitive functioning.
Our WAIS-style assessment mirrors the four-index structure of the WAIS-IV. Each index score is independently calculated and contributes to the Full Scale IQ, allowing identification of relative strengths and weaknesses across cognitive domains.
The WAIS uses deviation IQ scoring with a mean of 100 and SD of 15. Index scores provide more specific information than FSIQ alone — for example, a person may have superior verbal skills but average processing speed.
Adaptive difficulty, instant scoring, and a detailed cognitive profile across 4 indices. No registration needed — your results are calculated immediately upon completion.
Each domain is independently scored to give you a complete cognitive profile
Vocabulary, similarities, information, and comprehension
Block design, matrix reasoning, and visual puzzles
Digit span, arithmetic, and letter-number sequencing
Symbol search, coding, and cancellation tasks
From start to finish in 45 minutes
Choose your demographic for age and gender-normed scoring
Complete 40 scientifically calibrated questions at your own pace
Receive your IQ score and percentile ranking instantly
Explore your detailed cognitive profile and download your certificate
The Wechsler Adult Intelligence Scale (WAIS) is the world's most widely administered IQ test, used by psychologists in clinical, educational, and forensic settings. Our online adaptation implements the WAIS-IV scoring framework, producing both a Full Scale IQ (FSIQ) and four index scores.
The four index scales measured are: Verbal Comprehension (VCI), assessing vocabulary and reasoning with words; Perceptual Reasoning (PRI), measuring non-verbal and spatial reasoning; Working Memory (WMI), testing the ability to hold and manipulate information; and Processing Speed (PSI), evaluating the speed of cognitive processing.
All scores use deviation IQ methodology with a mean of 100 and standard deviation of 15. With 40 questions — the most comprehensive of all our assessments — the WAIS-style test provides the most detailed index-level breakdown available in a free online IQ test.
For comparison, try the Stanford-Binet IQ test which uses 5 cognitive factors, or our CHC assessment with 7 broad abilities. Our standard free IQ test offers a quicker 20-minute option, while the MoCA screening focuses specifically on cognitive health indicators.
Scores follow a normal distribution with a mean of 100 and standard deviation of 15
The WAIS-style IQ test is our most thorough assessment — 40 questions spanning four distinct cognitive indices. It's the right choice for anyone who wants a professional-grade intelligence evaluation based on the world's most widely used clinical IQ framework.
This assessment is ideal for:
If 40 questions feels like too much, our standard free IQ test gives you reliable results in just 25 questions. For the broadest cognitive ability map, the CHC Cognitive Assessment covers 7 broad abilities based on the Cattell-Horn-Carroll framework.
Each test offers a unique perspective on cognitive ability
Our WAIS-Style Intelligence Assessment features 40 questions measuring four cognitive indices — Verbal Comprehension, Perceptual Reasoning, Working Memory, and Processing Speed — modeled on the Wechsler Adult Intelligence Scale, the world’s most widely administered IQ test framework. Scores are normed against a global sample of over 27 million test-takers, giving you a meaningful comparison against a large and diverse population. While no online test is a substitute for a full clinical evaluation by a licensed psychologist, our methodology is grounded in peer-reviewed psychometric research and continuously refined to maximize reliability.
Test duration varies by assessment type, from 15 minutes for the MoCA screening to 45 minutes for the WAIS-style test. We recommend completing it in one sitting without interruptions for the most accurate results.
No — all our assessments are completely free. No registration, no credit card, no hidden fees. Take the test and view your full results instantly.
You'll receive your overall score, cognitive domain breakdown, percentile ranking compared to the general population, and a detailed interpretation of your cognitive strengths and areas for growth.
Yes, you can retake any test. We recommend waiting at least 1-2 weeks between attempts to ensure reliable results and minimize practice effects from question familiarity.