Limit participant to one response for whole experiment

[wakecarter]

By trial I assume you mean session.

You could add the Prolific id to the shelf and then halt the experiment if the value is already there.

Wakefield's Daily Tips

How to use the Pavlovia Shelf If you want to store and reuse information during a single session, you should just use a variable (such as a list or dictionary). On the other hand, if you want to store information for future sessions (either by the same participant in a longitudinal study or different participants) then the solution online is to use the Pavlovia Shelf. The Shelf is not designed for real-time interactions between participants so it should not be used accessed within an Each Frame…