Which participants will take my study?
What if I launch a study with no prescreening filters applied?
At Prolific our participant pool is made up of a wide range of participants from ma...
How do I use Prolific's demographic prescreening?
On Prolific, you have the option to enter prescreening criteria to filter the participants you need.
Here are a few examples of the severa...
How do I balance my sample within demographics?
You may wish to receive a specific distribution of participants across selected demographics. For example, if you want a 50/50 split of male and fe...
What is a representative sample and why would I want one?
A representative sample is a sample that reflects the demographic distribution of a give...
Representative samples FAQ
Who is eligible to be in a representative sample of the UK / US?
In order for a participant to be eligible for a representative sample, there must ...
How do I recruit a custom sample?
If you need to recruit a custom sample, and cannot obtain the specific population you require using our existing prescreening filters, it is not pe...
How can I invite specific participants to my study?
These features can be helpful in a number of scenarios:
You are running a multi-part / longitudinal study
You wish to include only participants ...
How can I prevent specific participants from accessing my study?
There are two ways to do this. Please note that it is currently not possible to block participants from studies that are being run at the same tim...
Can I screen participants within my study?
In most cases we ask that researchers do not screen participants out in their studies. Instead, you can apply Prolific's prescreeners to your stud...