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JATOS (Just Another Tool for Online Studies) helps you setup and run your online studies on your own server.

JATOS 2 allows you to run group studies, where multiple workers can interact with each other.

You can read our open access paper for the basics, but these docs contain up-to-date information about the new group feature.

We also started a blog about JATOS and online experiments in general. There we’ll post about topics that do not necessarily fit into these docs.

This documentation is available as

GUI Screenshot

JATOS at a glance:

  • Run studies on your own server. This means that you keep complete control over who can access your result data.
  • Run group studies.
  • It’s GUI-based, so there’s no need to use the terminal to talk to your server.
  • Mobile phone ready: Run your own, tailor-made studies, on any device with a browser (mobile phone, tablet, desktop, lab computer, thin client).
  • Studies are easily written by yourself in HTML / JavaScript / CSS (you will need some basic scripting skills).
  • Connect to the Amazon Mechanical Turk (MTurk) marketplace to recruit participants.
  • Manage workers, to e.g. make sure that each participant does your study only once.
  • Export/Import studies to facilitate exchange with other researchers.
  • It’s open-source and free to use.
  • It’s very easy to Get started!

Please cite us if you use JATOS for your research.

JATOS is open-source and released under the Apache 2 Licence. The source code is available on GitHub.

This is the Documentation for JATOS 2 - Are you looking for the Docs of JATOS 1.x?

Download the latest release