👥 Prolific's participants

Learn more about our participant pool and interacting with participants.

Prolific's participant pool


  • Who are the participants on Prolific?

    Where are Prolific's participants from? Prolific is only available for participants from most OECD countries, with the exception of Turkey, Lithuania, Colombia and Costa Rica. In addition, Prolific is also available to participants in South Afric...

  • How do participants find out about my study?

    Participants create an account on Prolific and are then notified of future studies they are eligible for based on the demographic information they provide. When your study is posted, an email will be sent out to a random subset of all eligible...

  • When are Prolific participants most active?

    Researchers often ask when the best time to launch their study is, or if there’s temporal usage patterns in the pool. The graph below shows the average number of submissions begun per hour over the course of a single day, averaged over 7 days to a...

  • How does Prolific prevent duplicate participant accounts?

    We use a number of tracking mechanisms - including IP address detection - to ensure that no participant takes part in a study more than once. To increase data fidelity, we make participants verify their accounts via email address and phone num...

Paying participants


  • Prolific's payment principles

    Ethical rewards On Prolific, we endorse the principle of 'ethical rewards'. We believe that fair pay leads to better data quality. We therefore recommend you pay participants at least £7.50 / $9.60 per hour, while the minimum pay allowed is £5.00...

  • Estimated vs average reward per hour

    When you set up a study on Prolific, you have to estimate the completion time for your study. The reward per hour shown on the study creation page before you collect any data is based on this estimate. We have a minimum reward rate of £5.00 / $6.5...

  • How do I resolve underpaying studies?

    If the average reward per hour for your study falls below the minimum rate required (£5.00 / $6.50 per hour), you will need to adjust the participant payments to bring this up to at least the minimum rate: If the average reward per hour drops bel...

  • How do I send bonus payments?

    Bonus payments are additional payments you can make beyond the normal payment for a participant's submission. You can use them to allow for variable rewards, prizes, or to make partial payments to participants who have not completed your study but...

  • Can I make partial payments to participants?

    Under certain circumstances you should award a partial payment to participants for the time spent on your study. Participants deserve partial compensation, for example, if they completed some of your study, but then a technical error occurred from...

Contacting participants


  • How can I contact participants?

    Contacting your participants directly can be useful if you need to know more about a participant's submission, or you want to notify certain participants of a follow-up study. This article will tell you how to do this by using either our internal ...

  • Can I resend notifications about my study to participants?

    We have a system in place through which we regularly send out emails inviting eligible participants who haven't taken part in relevant studies yet. You can learn more about how participants find out about studies here. You can sit back and relax! ...