Dataset overview and sources

This page summarizes where the Universal IQ Test dataset comes from and how the published statistics are produced. If you want a deeper explanation of formulas and limitations, see the Methodology and limits page.

Overview

The Universal IQ Test dataset is built from completed online IQ tests on universaliqtest.com. The statistics are descriptive: they summarize performance in this dataset and do not represent population averages or clinical IQ diagnoses.

Dataset sources

All published statistics come from first-party test results collected on Universaliqtest. We do not blend in third-party IQ datasets for the rankings or averages. Country, education, and study-area fields are provided by users during the test flow and are standardized into fixed categories for reporting.

What we collect

Test score (number of correct answers).
Time taken to complete the test.
Self-reported age band and gender.
Self-reported education level and study area.
Self-reported country, mapped to ISO country codes.

We publish only aggregated statistics. Individual-level records are not shown on the site.

Scoring and metrics

The core score is based on correct answers, with time taken used as a tie-breaker. For published charts, scores are converted to percentiles and then mapped onto an IQ-style scale (mean 100, standard deviation 15). We report means, medians, percentile ranges, and 95% confidence intervals for group averages.

Validation and quality

Each result is marked as validated or unvalidated using internal checks for timing, completion, and consistency. The validated view is our quality-focused subset. The all-results view includes everything and can be noisier for smaller groups.

Coverage and limits

The dataset reflects visitors to Universaliqtest, not a census.
Self-reported demographics can include errors or omissions.
Small sample sizes lead to wider confidence intervals.
Online testing conditions (device, language, environment) can affect performance.

Using and citing the data

You can cite the dataset by linking to the relevant statistics page and using the built-in download or embed tools. For research or media inquiries, please use the contact form on the site so we can provide the latest context for the numbers.