Phasing Out

ROLEG is being phased out and will not be available as of 1 January 2025. The application is currently available only for pre-existing experiments or experimental series.

For new experiments, please use Gorilla Online Experiment Builder. Visit CLS Lab's article about Gorilla for more information.

If you have any questions, 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

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.