Science and methodology
How our assessments work
WitsNSkills assessments are built on established psychometric frameworks used by organisations globally. This page explains the science behind each assessment and how career matches are calculated.
WitsNSkills assessments are designed to inform career exploration — not to replace professional career counselling, psychological assessment, or your own judgement. Scores reflect your performance on the day and should be considered alongside your experience, qualifications and personal goals. A high fit score does not guarantee success in a role, and a low fit score does not mean you cannot succeed in one.
Career Aptitude Assessment
The career aptitude test measures three cognitive abilities that research consistently links to workplace performance across career families.
Cognitive ability tests are among the strongest predictors of job performance across occupations. Meta-analyses by Schmidt and Hunter (1998, 2004) consistently show general mental ability as the single best predictor of job performance, with validity coefficients of 0.51–0.65.
Personality + Work Style Assessment
Our personality assessment is based on the Big Five personality model — the most widely validated personality framework in occupational and organisational psychology.
The Big Five (OCEAN) model has over 50 years of research behind it and is used by organisations including the NHS, UK Civil Service, Deloitte, McKinsey and the Indian Army for recruitment and development. See: Costa & McCrae (1992), Barrick & Mount (1991).
Skills + Domain Assessment
The domain assessment benchmarks your knowledge across four industry sectors — helping identify which fields align with your existing expertise.
Domain knowledge assessments are widely used in structured hiring. Unlike personality or aptitude alone, domain knowledge tests directly measure job-relevant expertise and predict ramp-up time in a new role.
Career Readiness Index (CRI)
The Career Readiness Index is a composite score (0–100) calculated from all three assessments. It is designed as an employability signal — not a ranking of human worth.
Composite assessments combining cognitive ability and personality consistently outperform single-measure assessments in predicting job performance. See: Schmidt & Hunter (1998) — combined validity of 0.63 vs 0.51 for cognitive alone.
How career matching works
Each of the 12 career paths in our system has a weighted profile of assessment dimensions. For example, Financial Analyst weights numerical reasoning and finance knowledge heavily, while HR Business Partner weights agreeableness and verbal reasoning.
Your normalised scores across all dimensions are compared against each career profile. The result is a fit percentage — how closely your profile matches the typical profile of someone who thrives in that career.
A 91% fit means your profile closely matches that career's requirements. A 60% fit means there is alignment but also meaningful gaps. These are starting points for exploration — not verdicts.
What our assessments do not measure
- ✗ Intelligence or IQ — we measure specific cognitive abilities relevant to work, not general intelligence
- ✗ Clinical psychological conditions — this is not a diagnostic tool
- ✗ Guaranteed career outcomes — no assessment can predict success with certainty
- ✗ Your full potential — assessments measure current state, not what you can become with effort and learning
- ✗ Cultural, socioeconomic or educational privilege — we acknowledge that access to education affects domain scores
Questions about our methodology?
We are happy to discuss the science behind our assessments or walk you through your results.