Prescreening and surveying individuals with cardiovascular disease


Hey everyone,

This is my first time using Prolific, and I’ve been struggling with the prescreening process.
I will be collecting data on individuals with and without cardiovascular disease.

Notably, the control sample is a little more challenging to prescreen due to the amount of cardiovascular disease risk factors that could exclude them.

My questions are as follows:

  1. Does there need to be a separate consent form for the prescreen and the actual study, or can it be lumped into one?
  2. Is there a way to automatically direct approved research participants to the full study?
  3. Does it make sense to rule out participants early in the prescreen if they do not qualify, or do they have to complete the prescreen no matter their responses.



Hi @Justin_Leiter-McBeth , welcome to the forum!
There’s a help page about recruiting custom samples that would be a good starting point!
In brief though,

  1. One prescreen study, one regular
  2. You add their Prolific PID to the custom allowlist for the second study
  3. It would probably make the most sense to have them do the whole thing. If it’s super long, you could make sure that in the instructions it’s clear that they can stop and return their submission at any time. That way as soon as they know that they won’t be eligible for the whole study they can elect to return the prescreen and just not get compensated for that

Does that help?

Thank you very much. That was helpful!
Once they take the prescreen questionnaire, how do I get them directed to the main study?
I’m a little confused about how this process works…

Dear Justin

Ordinarily you would add the Prolific IDs of those that passed the prescreening study to the allowlist of a new study and they’d be automatically asked to come to the second main study.

Not all will come back so typically you need to prescreen for about 1.5 times the number of participants that you need (but this depends on a lot of factors).

You can also send a bulk messages to the participants to encourage them to come using the method outlined here