How to transfer Participant number from one pavlovia experiment to a second one using "Completed URL"?

Thank you very much for this! Sorry to barge in on this thread, but as my question seems very related: how would I transfer group as well? So what should I add after the piece of code you gave?

I tried &group="+expInfo['group'] and &group='+expInfo['group'] but both seem incorrect.

I can’t see the difference between your two options there. Please could you show a screenshot of the completed URL

Here it is: This one works (but does not yet include group)

I tried it with ' behind group= and '' behind group= but neither seem to work:

The issue is that you need to put +"&group="+ rather than just &group=

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Thank you very much! Lesson learned