Methodology

• Big Five (five-factor model): trait dimensions used widely in personality psychology.
• Cognitive ability: structured problem-solving tasks used to approximate reasoning ability.
• Archetypal models: narrative patterns used as a lens for motivation and decision-making.

For core concepts, browse the glossary or the journal.

Treat results as directional, not deterministic. The most valuable output is the pattern: which dimensions are consistently strong, which are bottlenecks, and which environments amplify or suppress performance.

Score pages use the conventional IQ scale: mean 100 and standard deviation 15. Percentiles come from the cumulative normal distribution; rarity uses the relevant upper or lower tail. Values are rounded model estimates. A real result should also name the instrument and report its confidence interval, because norms and test ceilings differ.

Try it with the percentile calculator, read about confidence intervals, or see an exact score example. Converting SAT, ACT, GRE and other scores to IQ has its own method page.

Historical profiles are historiometric interpretations, never recovered test scores. Each page states whether a verified result exists, publishes a cautious range, assigns an evidence-confidence label, links sources and lists limitations. Achievement can support an inference of exceptional ability in a field, but it cannot establish an exact full-scale IQ.

Read and download the Historical Intelligence Index

Representative IQ averages are not available for most occupations. LifeScore's career number is an editorial comparison benchmark derived from role-demand ratings and broad research on cognitive ability and work complexity. It is not an occupational average, hiring rule or minimum score. Career pages prioritise tasks, education, experience, personality fit and work context.

Explore the Career Demand Index

Assessments are for education and self-development. They are not a medical diagnosis. If you are dealing with mental health concerns, consult a qualified professional.