Random assignment of an equal number of participants to experimental conditions

Is there a way to randomly assign an equal number of participants to specific conditions, e.g. 30 in condition A and 30 in condition B (without e.g. Qualtrics) so that the experiment stops when I in sum tested 60 participants (and also only paid for 60 participants)?

Thank you very much for any help!


Iā€™m thinking of adding an automatic stopping condition to my new VESPR Study Portal. However, even without it you should get 30 in each group and you can manually deactivate the PI sheet when you have finished recruiting.

Random allocation to groups with reassignment of unfinished participants is a licenced feature, but you can use the free version or my previous app to allocate participants based on their participant%2.

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