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(lightbulb) A how-to guide to design and develop your intervention protocol

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1-month physical activity study with daily lottery incentive for meeting goal of >10,000 steps and text weekly check ins

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  1. Welcome to study message
    • Start: Day 0
    • Time: As soon as the participant is started in the arm
    • Message:PARTICIPANT, welcome to the Fitbit study! Thank you for enrolling. 
    • Repeat: no

  2. Daily step count from Fitbit
    • Start: Day 0
    • Time: As soon as the participant is started in the arm
    • Length of window: All day
    • Repeat: daily- every 1 day, 30 times 
    • Compliance: If participant walks > 10,000 steps, mark as meeting their goal

  3. Daily lottery 
    • Start: Day 1
    • Time: 11 am 
    • Repeat: daily- every 1 day, 30 times 
    • Feedback: if participant met their step count goal the previous day, then make them eligible for the lottery 
    • Message: 
      • eligible winner: You met your step goal yesterday and won AMOUNT in the lottery!
      • eligible loser: You met your step goal yesterday, but did not win the lottery this time.  Keep up the good work! 
      • ineligible winner: Had you met your step goal, you would have won AMOUNT in the lottery.
      • ineligible loser: Had you met your step goal, you would not have won the lottery this time. 

  4. Exercise tip #1 
    • Start: Day 3
    • Time: 9 am 
    • Message: Exercise tip #1: Use a buddy system! Find a friend or relative who also wants to establish a healthier lifestyle and keep each other accountable to goals. 

  5. Weekly check in text response 
    • Start: Day 7
    • Time: 10 am 
    • Message Prompt: Hi PARTICIPANT_FIRSTNAME, do you need help meeting your step goals? Text back yes or no. 
    • Length of participant response window: 10 am - 11:59 pm 
    • Repeat: weekly- every 1 week, 4 times 
    • Message:
      • if participant texts back 'no': 
        • participant: We are glad to hear that you are meeting your step goals! Keep up the great work! 
      • if participant texts back 'yes': 
        • participant: Thank you for your response. We will reach out to you for assistance within one business day. 
        • study team: Participant needs help meeting goals.  Reach out for assistance. 
      • if participant texts back invalid formatted text:
        • participant: We didn't understand your response, please text back 'yes' or 'no'.

  6. Mid point survey

    • Start: Day 15

    • Time: 11 am

    • Message Prompt: Hi PARTICIPANT, please click the following link to complete the mid-point survey! You have until END_DATE to complete the survey.  SURVEY_LINK

    • Amount of time participant has to complete survey:14 days 

    • Result of Survey Completion: if participant completes the survey, pay out $50 

       

  7. Mid point survey reminder

    • Start: Day 18

    • Time: 11 am 

    • Message: Please rememeber to log into the Fitbit study to complete your mid-point survey! 

    • Repeat: daily- every 2 days, 3 times 

    • Only send reminder to those who haven't completed the survey 

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