Incoming Upgrade of ROLEG

We are pleased to inform you that a new version of ROLEG is scheduled to be released in the week 38 of the year 2023. This release, ROLEG 4.0.0, comes with better performance and a brand-new user interface. We have added the option to request a researcher account with a click of a button and an interface for searching, filtering, and sorting experiments.

ROLEG 4.0.0 will no longer support experiments from DSL version 2. We will archive the source files and results of experiments written in the outdated version. Shall you require continuous access to the files associated with your version 2 experiments, please consider downloading them before ROLEG 4.0.0 is released.

Please note that we have postponed the upgrade from the previously scheduled date of 3 July 2023 to ensure we deliver a high-quality product with additional features.

If you have any questions about the coming changes, do not hesitate to contact us at

Welcome to ROLEG

On this website you can find information about the online language experiments of the Faculty of Arts at Radboud University Nijmegen, and you can register as a participant.

You have a part to play

How do people make sentences? How do people learn to understand a foreign language? How do children learn to speak? Scientific linguistic research is necessary to find answers for a world that we are increasingly demanding of. This research would not succeed without the input of test subjects. Would you like to contribute to science? Help our language research move forward and become a participant at ROLEG!

What do we expect?

Everyone is welcome to become a participant: from young to old. What we expect from you depends entirely on the type of research. For example, there are experiments where participants watch videos, read sentences, or hear sentences and respond to them by pressing certain keys on a keyboard, or typing sentences. In addition, participants can give their opinion on certain statements with the help of surveys.

Research institure for Language

Our researchers work within the Centre for Language Studies (CLS), a research institute of the Faculty of Arts. They want to know what people are really saying and how they communicate: they are studying real language of real people. There is no right or wrong in this. As a test subject, you cannot do anything wrong in a language experiment.

It takes three steps to participate

  • Register as a participant here
  • Log in with your details
  • Choose an experiment from the list and participate!

If you already have an account, please log in with your existing details.

Questions about registration?

If you have a question about participating in research, please contact us via

Please register as a user to participate.