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Waiting rooms

By default, Dallinger begins an experiment as soon as a user agrees to the informed consent form and has read the instructions. However, some experiment designs require multiple users to be synchronized.

For this reason, Dallinger includes a waiting room implementation, which will hold users between instructions and the experiment until a certain number are ready.

Using the waiting room

To use the waiting room, users must first be directed into it rather than the experiment.

Your instructions.html should call dallinger.goToPage('waiting') and should not call dallinger.createParticipant.

You will also need to define how many users should be held together before progressing. This is done through the quorum global variable. The waiting room will call a javascript function called getQuorum which should set quorum to be the appropriate value for your experiment.