FAQ
  • General FAQs
    • How do I verify my account?

      After registration, you will get an email which contain link to verify your account. Note that your personal information is collected for verification purposes only. This information will not be used for marketing purposes in any way.


    • What is Populix?

      Populix is a platform where we connect researchers with study participants. Researchers post studies and recruit the right participants fast and affordably. For participants, it is a good way of being involved in interesting studies while earning monetary rewards!


  • Participant FAQs
    • When will I be paid for a study?

      Your submissions will be reviewed by the researcher before the reward is credited to your account. This normally takes a few days. After 10 days they are automatically approved and added to your account.


    • Who can participate in studies on Populix?

      In principle, anyone can sign up and participate. You'll need to verify your account before you can take part! Please note that many studies have eligibility criteria. This means that sometimes only certain demographics are required. If you are not eligible for currently available studies, then we kindly ask for your patience. New studies are posted regularly.


    • Will I get an email notification when a new study is available?

      Whenever a study gets posted, a random subset of eligible participants is emailed. In other words, you will occasionally get emails inviting you to participate. Originally, we emailed all eligible participants at once, but this led to some frustration because the fast participants would always get to complete the studies. We think that the current approach is pretty fair, but let us know if you have any suggestions for improvement.


    • How many studies can I participate in?

      As many as you wish - the sky is your limit. Since we're a young start-up, please bear with us for now - we'll do our best to allow for new studies to be posted.


    • My work was rejected, what can I do?

      A researcher may reject your work if they believe that some answers you gave are wrong, the study was not completed correctly or that the instructions were not followed. If you believe that your submission was rejected in error, you may decide to contact us at support@populix.co.


    • How much time do I have to work on a study?

      Researchers can specify the "Estimated Completion Time" for a study or in other words, how long a participant should approximately take to complete a study. Researchers also specify a "Maximum Completion Time". You should always aim to complete the study in less time than allotted by the researcher. This mechanism ensures that studies are completed in a reasonable time period. If you take too long to submit the study you are participating in, then you'll time out and the researcher may reject your payment.


    • How do I participate in a study?

      First, sign up for free as a participant. Click on "Studies" – all studies available to you will be shown here. You may or may not be eligible for certain studies. To find out whether you are eligible, try answering some pre-screening questions.

      If you are eligible and would like to participate in a study, select the "Select This Study" button. Complete the study according to the researcher's instructions.

      Please note: Researchers should never ask you for identifiable information (e.g. your email). Also, they should never have pre-screening questions as part of their study. If they do any of this, please report this back to us at support@populix.co

      Upon successfully completing a study, you will have to wait until the researcher approves (or rejects) your submission. This usually happens within 1-3 days, but may sometimes take up to 10 days. We kindly ask for your patience while researchers do their best to review your submissions as quickly as possible.


    • How do I update my answers to pre-screening questions?

      Please note that you should always provide truthful answers to prevent compromising researchers' data.

      • - Go to Dashboard >> Pre-screening
      • - Under the 'Responses' section, delete the answer to the question you wish to change
      • - After some time you will be automatically prompted to answer the question again


  • Researcher FAQs
    • How do I pay participants?

      As soon as you have finished data collection, go to "Submission" in dashboard overview. Here you will see a list of all participants who completed your study. The default is on "Accept", however you have the option to reject study submissions. We recommend that you inspect your newly collected data to ensure it satisfies your expectations, and then decide which submissions to accept/ reject. Accepted participants will be automatically rewarded with the amount specified in the beginning of the study.


    • How much time do I have to reward participants?

      Our system is set up such that each participant can have only one submission per study on Populix. That is, each participant will be listed in your dashboard only once. However, we obviously can't prevent people from visiting the survey link more than once after they have opened it for the first time. Sometimes, participants revisit a survey link if, for example, they have missed the completion URL. It is important to distinguish between submissions on Populix (which we guarantee are unique) and submissions to your survey software such as Qualtrics (which we don't have control over). To prevent duplicate entries in Qualtrics enable the "Prevent Ballot Box Stuffing" option.


    • Reviewing submissions: How do I decide who to accept/reject?

      On Populix, you have the option to reject low-quality submissions. However, before you reject submissions, please think carefully whether the rejection is justified. Nobody likes to get rejected, so please try to keep rejections to a minimum.

      Valid reasons for rejections are, for example:

      • The participant completed your study exceptionally fast. By "exceptionally fast" we mean participants who are statistical outliers.

      • The participant skipped crucial questions. Crucial questions are those that are inevitable to answering your research question. Demographic questions, for example, do not necessarily fall under "crucial questions" because participants have the right to withhold such sensitive information (according to guidelines by the British Psychological Society).

      • The participant failed one or multiple attention checks.


    • Can I get a refund if I don't use all the money I add to my account?

      Yes. The refund process depends on the payment method. Please contact us at support@populix.co for such inquiry.


    • What's the make up of your participant pool?

      Our participants' demographics are quite mixed. We are doing our best to have a pool of participants that are as diverse as possible.