Hello,
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 ??
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
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? 
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 
Wonderful! Let me know if you run into any other issues
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I am afraid that Josh has moved on to start his own company, and Prolific has withdrawn an official presence from this forum.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.
Tim
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?