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- Name the arm
- Participants: Indicate how many participants of the total number of participants should go into this arm
- Auto-start?: Indicate if you would like the participant to be automatically started by WTH once they have completed all of the enrollment steps or if WTH should wait for a researcher to manually start them from the profile or Manage Participants view
- Financial Incentives: Check the box if...
- Payments: Your participants will be paid any amount, such as an enrollment or survey completion payment. Payments must also be checked for any studies using lotteries.
- Lottery: Your study will have an arm with lottery incentives.
- Fixed Position: You create a lottery with a certain number of digits and people win if their numbers match in the exact order (the same digit occurring in the same position). You can set a prize for each possible number of matches.
- Most commonly used lottery scheme with digit drawing 2
- Example:
- Lotto: You pick the number of digits in a lottery and then what the prize would be for matching any number of those digits. Position does not matter
- Fixed Position: You create a lottery with a certain number of digits and people win if their numbers match in the exact order (the same digit occurring in the same position). You can set a prize for each possible number of matches.
- Example:
- Number of digits: You set the number of digits the lottery. This applies to both the participant-chosen lottery numbers, and the selected winning numbers. Lotteries must be at least 1 digit. Most lotteries will likely be 2 or 3 digits.
- Note: Only one type of lottery can be added per arm