Setting up second wave of a longitudinal study

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Hi there - I’m setting up the second wave of a longitudinal study and want to invite back only participants that took part in the first wave of my study, without inviting anyone new ones. I know that you can select to invite back previous participants through the pre-screening section; however, I don’t know what to set the participant recruitment number at.

I originally had 2200 participants and once setting the pre-screen to invite back these original participants, Prolific is giving me a figure of 2093 that meet this requirement. The thing is, I can’t just set it to that number because not all of them will necessarily take part in the second wave. So given that I don’t want Prolific to then just make up the numbers with new participants, how do I program it so that only participants from the previous study take part? Do I just program the pre-screen for returning participants and leave the participant recruitment box blank?

Thanks in advance for any answers or insight!
Joe

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You can include them based on their ID (custom screener) or based on their participation in your previous wave (include only if they took part in __ study). Good luck with your research.

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Thanks Winnie