🤔 Ask Anything Thread (Newbie Friendly)

I wrongly approved two submissions of participants who timed out from my survey. The participants were paid for this and there is no way for me to undo my mistake. Would Prolific be able to retrieve the wrongly approved payment?

Hey Adam, welcome to the community!

Since we’d need to discuss participant IDs to resolve this, it would be better if you send a support ticket to our team.

Message me with your support ticket number and I’ll make sure it’s prioritised :slight_smile:

Thank you Josh for the swift reply. My issue has already been settled by the support staff. :slight_smile:

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Hello! We are curious when the busiest times are for Prolific in terms of both participants (U.S. participants, U.S. eastern time) & for researchers (available studies).

For example, what day of the week / time of day does Prolific have most participants simultaneously online? → Would help schedule group studies.

Also, what day of the week / time of day does Prolific have fewest studies online? → Would also help schedule studies that we might want to get quick submissions.


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Hi Cosanlab, it’s great to have you as part of the community!

Participant Activity

Below is a graph showing submissions per hour of the day of US participants (in EST).

Researcher Activity

Below is a similar graph showing the number of studies published per hour of the day.

Given that researcher activity peaks around 10-11am, and participant activity peaks around 13:00, then perhaps publishing between those times will get you the sweet spot you’re looking for.

That being said, the average study on Prolific is completed in under 2 hours, and we generally see most studies complete within the first 24 hours. So, I wouldn’t worry too much about timings!

I hope this info helps! :slight_smile:

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I have some money left over from a previous study and set up another study to use this, but I have problems publishing the study. An error shows up, that says I have to top up my account in order to publish, but I have the required total sum in my account.


Hi Fozia, welcome to the community! It’s great to have you here :tada:

That’s probably due to a discrepancy between your total and available balance.

Your total balance is the total amount of money in your account from the top-ups you’ve made, minus any funds spent on participant payments. Your available balance is how much you will after any active studies have been completed.

So, it’s likely that your total balance is showing that you have enough, but your available balance is not enough because some of your money is reserved for an active study on your account. You can read more about this here.

And you can check your different balances here.

Does that help? Let me know if I can help further!

It helped, thank you!

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Hello everyone! I have a question about “first language” filters. I want to recruit native English speakers only, so I selected “English” as an appropriate filter. However, after recruiting 4 initial participants and checking their data, it seems that only 1 of them is actually English (I included several demographics questions that do not correspond to what these people answered in your screening questionnaire, and I’m also messaging them). Is there any way I could potentially improve the screening so only native English speakers get my invitation? My experiment is 1 hour long, and rejecting people who spent so much time on it feels horrible. I clearly say “native speakers of English only”, but I’m guessing since they receive an invite from Prolific, they don’t see a problem with completing the study.

Hey Magdalena, welcome to the community! It’s great to have you aboard :tada:

We run checks on participants to ensure that their language abilities are as good as they claim. But some people do manage to evade these checks, and I’m sorry that you’ve experienced that!

To help combat this, we’ve enabled the reporting of participants in-app. You can read about that here. Once you report them, we will investigate and take actions to safeguard data quality.

Thanks for letting us know! :slight_smile:

HI there,

My colleague and I are thinking about doing a survey study with parent-child dyads. I have found your answer about studies on couples very helpful (Running studies on couples – Prolific). But I wonder if this two-study setup can be applied to a parent-child dyad, where the child might not necessarily have the Prolific ID. Mant thanks in advance!


I am interested in collecting data from 3 different groups of people. I would have all of the three groups do the same task. Is the best method for collecting this data to design 3 studies in prolific, one targeting each group, and send them all the same experiment (for example, I could create one study on prolific, duplicate it in drafts twice, and adjusting the filters accordingly)? Or is it best to just run one study in which the filters target all three groups at once?


Hey Anthony, welcome to the community!

Unfortunately, we won’t be able to support your study as all participants on Prolific must be at least 18 years of age. Recruiting children, even with their parents present, is against our current company policy. For now, we would recommend seeking alternative sources of participant recruitment for this research, and you may wish to explore how others in your field are going about this via the forum or ResearchGate. Sorry that I don’t have better news.

And when you have time, introduce yourself to the community :slight_smile:

Hey there! Welcome to the community! It’s great to have you aboard.

Yes, the first method you’ve described is the best way to go about it. The second method won’t get your desired result.

Is there any crossover between the groups? If so, don’t run the studies concurrently as we’re unable to stop participants from completing more than one of your studies. To ensure nobody does this, use our custom blocklist feature.

Let me know if I can help further!

And when you have time, introduce yourself to the community :slight_smile:


Hello, I am an academic researcher and would like to know how much Prolific costs per survey respondent?
Thank you so much!

Hi Shagufta! Lovely to have you here :slight_smile:

On Prolific, we endorse the principle of ‘ethical rewards’. We believe fair pay leads to better data quality. So, we recommend you pay participants at least £7.50/$9.60 per hour, while the minimum pay allowed is £5.00/$6.50 per hour. You can read more about our policy here.

So, it’s ultimately up to you, as long as you’re paying at least £5/$6.50 an hour.

Let me know if there’s anything else I can help with.

Hi Josh, I want to use a custom screening questionnaire to identify eligible participants to complete the whole questionnaire. I understand I have to use 2 separate studies to do this, with an Allow list for the second study for participants who screen positive in the first study. My question is how to handle an ethics plain language statement for these studies. Would you recommend separate a PLS for each study, even if the first ‘study’ is only 2 questions? Thanks, Amy.

Hey Amy, welcome to the community! It’s great to have you here.

We would advise you to double check with your ethics/IRB board/university because ethics statement requirements will vary with institution.

But, in general, it won’t hurt to have two separate statements :slight_smile:

Hi Josh, I want to check if Pavlovia is compatible with Prolific. Also, I would like participants recruited from Prolific to first be directed to Qualtrics and then Pavlovia, is that possible in one study?

Hi Alejandra, it’s great to welcome you to the community!

Pavlovia is compatible with Prolific :slight_smile:

And yes, you just need to send participants from Prolific to Qualtrics, link from Qualtrics to Pavlovia then back to Prolific. As long as you make sure to redirect participants back to Prolific at the end then this should work. I’d suggest that you run a pilot study to make sure everything is working smoothly.

We’d also love to get to know you a bit better. Come say hi in our intros thread :wave:

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