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IQ (Intelligence Quotient) is a score derived from standardized tests designed to assess human intelligence. It typically measures various cognitive abilities like reasoning, problem-solving, verbal comprehension, and processing speed. These abilities often correlate, leading to the concept of a general intelligence factor ('g'), which represents the shared variance among different cognitive tasks. OpenIQ tests aim to accurately measure these abilities.

Yes. Our IQ tests are developed based on established psychometric principles and research, aiming for high validity and reliability comparable to professional assessments like the WAIS or Stanford-Binet. They correlate strongly with the general intelligence factor ('g-factor' or 'g') and are designed to provide meaningful insights into your cognitive profile. See our News/Research section for validation studies.

OpenIQ combines scientific rigor with accessibility. Unlike many online quizzes, our tests are:

• Free: No cost to access our core assessments.
• Validated: Based on psychometric research and comparison with gold-standard tests.
• Comprehensive: Often measuring multiple facets of intelligence based on models like CHC theory.
• Transparent: We provide information on the design and theoretical basis of our tests.

The Cattell-Horn-Carroll (CHC) theory is a widely accepted and influential model of the structure of human cognitive abilities. It proposes that intelligence is hierarchical. At the very top sits the general intelligence factor (often denoted as 'g' or the 'g-factor'), representing overall cognitive ability which influences performance across diverse tasks. Below 'g' are several broad abilities (like Fluid Reasoning (Gf), Crystallized Knowledge (Gc), Quantitative Reasoning (Gq), Processing Speed (Gs), Short-Term Memory (Gsm)), and below those are numerous narrow, specific skills. Our tests often draw inspiration from this comprehensive model to assess a range of abilities beyond just a single score.

We prioritize your privacy. Test results are stored locally in your browser by default. If you create an account and choose to sync scores, they are stored securely using industry-standard practices. We do not sell your personal data. See our Privacy Policy for details.

Currently, OpenIQ is focused on individual assessment. However, we are exploring options for group testing and organizational solutions. Please contact us if you have specific requirements for team or enterprise use.