Measure carefully.
Interpret humbly.
Fifty problems, drawn fresh for each sitting from a bank of 145 original items, sample fluid, quantitative, verbal, spatial, and working-memory performance. Scoring is fully transparent: raw correct counts, a plainly labeled measurement band, and a per-domain profile — no black-box curve fitting, no invented precision.
Why: reasoning under time pressure feeds every other work skill.
Evidence: Schmidt & Hunter’s 85-year meta-analysis ranked general mental ability the top predictor of job performance (≈ .51) and training success; a 2022 re-analysis argues ≈ .31 under stricter corrections — the ranking holds either way.
Sources: Schmidt & Hunter (1998), Psychological Bulletin · Sackett et al. (2022), Journal of Applied Psychology
Best on a laptop or tablet. Each sitting draws a fresh sample of 50 from the 145-item bank, so retakes differ — but do not retake for at least six months; practice can inflate the result.
Scoring your responses…
Raw correct counts per domain — nothing fitted, nothing hidden
Performance by domain
Session notes
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