About QuizWren

Who we are

QuizWren is an independent project, not a clinic or a testing agency. It exists for a simple reason: measuring your own mind should be something you can do out of curiosity, for free, without handing your data to anyone or being sold a number dressed up as a diagnosis.

We build cognitive tests and games that run entirely in your browser, and we explain how each score is produced instead of hiding it behind a professional-sounding brand. We have no famous names or lab credentials to trade on, so we earn trust the only honest way there is: transparent methods, plain language about what each result can and can't tell you, and a privacy model that keeps your answers on your own device. We publish under the site's own byline, QuizWren — a house name for the small team behind the site, not a credential we're claiming. Our editorial standards spell out how we check what we publish and how to send a correction.

What you'll find here

Everything on the site is free and needs no account:

• The IQ test — 35 Raven's-style progressive-matrix questions with a 25-minute limit, scored on the deviation-IQ scale (mean 100, standard deviation 15).
• The personality quiz — a Big Five (OCEAN) profile across openness, conscientiousness, extraversion, agreeableness, and neuroticism.
• Brain games — memory span (recall increasingly long sequences), logic puzzles (pattern completion and odd-one-out), and reaction time (visual processing speed).
• Tools — an IQ percentile calculator, a mental-age estimator, and a reaction-time benchmark for quick one-off checks.
• The blog — essays on intelligence, testing, and how the mind measures itself, written to be read rather than to rank.

How the IQ test is built and scored

The test is 35 pattern-recognition questions based on Raven's Progressive Matrices. Each item shows a 3×3 grid with the bottom-right cell missing, and you pick the piece that completes the pattern from six options. Difficulty rises steadily: early items involve a single rule, while later ones combine several rules governing shape, colour, size, and rotation at once. You have 25 minutes.

Your raw score — the number of correct answers out of 35 — is converted to an IQ number using a deviation-IQ formula calibrated to a mean of 100 and a standard deviation of 15, the same scale standardized intelligence tests use. Your percentile is the share of the population you scored higher than, read from the standard normal curve: a percentile of 84 means roughly 84% of people scored below your result. The scale is design-anchored — each item is hand-built into a deliberate difficulty tier, and the formula is fitted to that designed ramp — not normed against a population study. That makes your result a consistent estimate of your pattern-recognition ability, and we'd rather say exactly that than imply a precision we haven't earned.

Read the full methodology for the exact formula, what "calibrated" means here, the threshold comparison, and the limits of a single sitting.

Score interpretation

Your IQ number falls into one of six bands. The percentile column is derived from the same standard normal curve used to score the test, so a band label and a percentile always tell the same story.

What our tests are not

Every test on this site is designed for educational and entertainment purposes only. It is an online estimate, not a clinical assessment, and it should never drive clinical, educational, or employment decisions. A real, diagnostic IQ measurement comes from an instrument like the WAIS-IV or the Stanford-Binet, administered one-on-one by a licensed psychologist — not from any website, ours included. Treat any single sitting as a snapshot, too: fatigue, a cramped phone screen, or a noisy room can all pull the number down, and taking a test twice tends to nudge it up through practice rather than any real change in ability. We are also not affiliated with any high-IQ society; where we reference their admission threshold, it is a factual comparison on a shared statistical scale, nothing more.

Privacy by architecture

Your privacy here isn't a policy promise — it's how the site is built. The entire app runs in your browser as static pages: there is no account to create, no login, and no server that stores your answers. Every question you answer is scored on your own device, and the individual answers behind your result never leave it. Only the finished score and percentile travel onward — encoded in the shareable page address, so you can revisit or post your result. The site pays its way through display ads and optional paid certificates, never by collecting or selling what you do here.