No participant taking the survey


Previously I have run several studies through prolific and it has worked perfectly fine. However, this time I am seeking participants with particular iPhone models ( from iPhone 8 to the latest), though the platform says there are 30k eligible participants available. Nobody yet has participated in the study. It’s already been 4 hours. Is this normal ? Any suggestions ??

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Hi @adityapurohit,

I don’t think this is normal. I might suggest you give the name of your study to @Josh, and he will try to “Refresh” your study from his side.

I have a similar problem. I did not receive any submissions for over an hour. I got two submissions now, but it is going very slowly, even though there should be about 45K eligible participants… I wonder what’s going on @Josh

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Hey @Anouk_van_der_Weiden, I’m sorry to hear that you’ve been having trouble. Study fill times depend on all sorts of factors like time of day, prescreeners, participant availability etc.

But, I can refresh the study for you if you’re still having trouble? :slight_smile:

Hi @Josh,
Thanks, but fortunately everything worked out fine in the end, it just took a little longer than I was used to (despite time of day, pre-screeners, study length, and payment being similar to my previous studies; the only difference was the balancing of sex). I still reached my target of 150 participants in 5 hours, so I can’t complain :slight_smile: :grinning_face_with_smiling_eyes:

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Wonderful! Let me know if you run into any other issues :slight_smile:

Hello @Josh,
I launched my study 1 week ago (target: participants redising in Germany, age group: 40-69). Unfortunately, after one week I only received 40% of responses (85/210).

Apparently, the system found 241 matching participants who have been active in the past 90 days.

In your view: does it make sense to give it more time? Is there any way to speed up the data collection process?

Hi, @Josh!
I have a similar problem.
I used to have no problem with collecting data before. However, with the duplicated study, only 2 participated in 24 hours.

If it is possible, could you please refresh the study to speed up the data collection process?

Dear Jaehyun

I am afraid that Josh has moved on to start his own company, and Prolific has withdrawn an official presence from this forum.

Duplicating your study again, increasing the payment, adding a more meaningful explanation, or asking support are the only ways forward that I can think of.


Thank you for the reply!

I’ve been having this same problem for the past few weeks!

I am also going through this now. I just posted a study over an hour ago. Supposed to have 38,000+ eligible to take the study, but so far have 0 participants out of 400. Any suggestions?

I am experiencing the same problem. I posted a study over an hour ago. Although the platform says there are more than 35k eligible participants, nobody has yet participated in the survey. Any suggestions?