How we test
Last updated: 11 November 2026
HumanTestKit is written and maintained by Murat Şahin. This page explains how every test on the site is built, so you can judge how far to trust a result.
What every test is
Each test is a browser version of a task that research uses to study vision, hearing, reaction speed, memory, attention or personality. The test runs on your device; your answers and scores are not sent to us. Every page has the interactive test at the top and an article below it that explains what the test measures, how to read the result and where its limits are.
How we choose numbers and sources
- Typical values only from published research. When a result card compares you with "typical", the value comes from a named study or standard, and the article cites it in its sources section. Where no comparable published value exists, we show no comparison.
- No invented percentiles. We do not say "you beat 80% of people" unless we have the data to back it up. Today we have no such data, so we never say it.
- Our own labels are marked as ours. Some result cards use plain-language bands (for example "faster than average"). Where those bands are our own choice rather than a clinical norm, the article says so.
- Questionnaires. Personality items come from the public-domain International Personality Item Pool (IPIP) or are original items written for this site; original scales are labelled as not normed. We do not copy commercial or copyrighted questionnaires.
- Checking sources. References are checked against the original publication or a library record. When a detail cannot be verified, we remove it or soften the wording.
How the text is written and reviewed
Articles are drafted with the help of AI writing tools and then reviewed: every number, threshold and button name is checked against the test's code, references are verified, and the Turkish version is written for Turkish readers and reviewed independently by more than one reviewer rather than translated word for word.
What an online test cannot do
A screen that is not calibrated, ordinary headphones, a wireless mouse or a busy room all affect results. Online tests are useful for curiosity, practice and noticing changes over time. They are not medical, psychological or educational assessments and cannot diagnose anything. If a result worries you, talk to a qualified professional such as an eye doctor, an audiologist or your GP.
Corrections
If you find a mistake, an unclear instruction or a source that does not say what we claim, please tell us through the contact page. We fix confirmed errors and update the date at the top of the affected page.