# The library of the mind

> Who writes Mentarium, how every page is built and checked, what the IQ test is and isn't, and how to report a mistake. The library of the mind, explained.

Canonical: https://mentarium.io/about.md

About

Mentarium explains mental models, cognitive biases and decision tools so you can use them on a real decision today, not just recognize the names. It is written and maintained by [Nemo](https://nemobuilds.dev), an independent maker who builds software and writes about thinking tools.

## How every page is built

- **The same structure everywhere.** A 40 to 60 word definition, where the idea comes from, how to use it step by step, three examples, common mistakes, a comparison with its closest neighbor, our take and an FAQ.
- **Sources over vibes.** When a page names a study, it names the authors and the year. When research is disputed (the size of loss aversion, the Dunning-Kruger statistics, country IQ averages), the page says so.
- **Examples are labeled.** Most examples are hypothetical and written as such. We don't invent quotes, numbers or case studies.
- **Original frameworks, named.** The [Mentarium Decision Loop](https://mentarium.io/decision-making), the [Decision Weight Score](https://mentarium.io/tools/decision-weight-score), the [Bias Radar](https://mentarium.io/biases) and Model Stacks are our own and are defined the same way on every page.

## About the IQ test

The [IQ test](https://mentarium.io/iq/test) is a practice test with original questions. It is not normed on a representative sample and it is not a clinical assessment, so the number it gives is a rough estimate. Only a licensed psychologist using a standardized test (such as the WAIS) can give you a real IQ score. The result is always free.

## Written with AI, edited by a human

Drafts are produced with AI assistance and then checked by a person against the sources and our content rules before publishing. If you find an error, tell us and we'll fix it and date the update.

## Contact and corrections

Write to [support@mentarium.io](mailto:support@mentarium.io). Mentarium is educational content, not medical, psychological, legal or financial advice.