What the score is — and what it is not
Your result is an estimated reasoning percentile with a confidence band. Short forms (12 items) carry a ±12-point band; full forms (60 items) narrow this to ±4 points as the sample grows and empirical norms stabilise. This is a cognitive screener, not a clinical IQ test. It does not produce a diagnostic score, does not replace clinical assessment, and should not be used for high-stakes educational or employment decisions without professional evaluation.
The six reasoning subdomains
Fluid reasoning (Gf) — novel pattern recognition and inductive logic, the closest proxy to "general reasoning". Verbal reasoning (Gc) — word relationships, analogies, and logical argument in language. Spatial reasoning (Gv) — mental rotation and 3D-from-2D inference. Numerical reasoning (Gq) — quantitative patterns, arithmetic, and quantitative logic. Working memory (Gsm) — holding and manipulating information during multi-step tasks. Processing speed (Gs) — accurate response under time pressure, measured only in timed sessions.
Reference: Schneider, W. J., & McGrew, K. S. (2012). The Cattell-Horn-Carroll model of intelligence. In D. Flanagan & P. Harrison (Eds.), Contemporary intellectual assessment (3rd ed.). Guilford Press.
How the overall composite is computed
Subdomain percentiles are combined using g-loading weights derived from WAIS-IV technical data and CHC meta-analyses (fluid 0.92, verbal 0.85, working-memory 0.75, numerical 0.72, spatial 0.65, processing-speed 0.45). This gives higher-loading domains proportionally more influence on the overall estimate, consistent with the empirical structure of cognitive ability.
Reference: WAIS-IV Technical and Interpretive Manual (2008). Pearson Assessment.
Timed vs untimed sessions
The default session is untimed — items are scored on accuracy only. Selecting Relaxed or Exam mode records response times and applies a symmetric speed adjustment (±25%) to processing-speed items, which are defined by speed-accuracy tradeoff by construct. Non-speeded domains are unaffected. Untimed and timed percentiles are not directly comparable across users.
What the screener does and does not predict
Cognitive ability measures predict academic and occupational outcomes at a population level (Schmidt & Hunter 1998 meta-analysis: r ≈ 0.51 for job performance). They do NOT predict: motivation, conscientiousness, social effectiveness, creativity in open-ended domains, or emotional regulation. The subdomain profile is usually more actionable than the overall percentile.
Reference: Schmidt, F. L., & Hunter, J. E. (1998). The validity and utility of selection methods in personnel psychology. Psychological Bulletin, 124(2), 262–274.
How to read your percentile band
Your headline result is a percentile band, not a single number. A band of, say, the 55th–67th percentile means your reasoning performance most likely sits above 55–67% of the people in our response sample — the spread is the honest margin of error, not vagueness. Read the band, not its midpoint: a wide short-form band (±12 points) says "directionally above or below typical"; the full form narrows it to ±4 points before you should read finer distinctions into it. The 50th percentile is exactly typical by definition — half of test-takers fall on each side of it — so a result near the middle is the most common outcome, not a poor one.
Reading your subdomain profile
The six subdomain bars are usually more informative than the overall composite. Look first at the gaps between them: a tall verbal bar next to a shorter spatial one is a profile, not a flaw, and that shape tends to track your education, occupation, and recent practice more than any fixed ceiling. Treat your lowest band as a pointer to where targeted practice has the most headroom, and your highest as the kind of reasoning you can lean on. Because the domains are correlated but distinct, most people show some unevenness — a perfectly flat profile is rarer than a jagged one.