Thank you for your interest in our study on an Apple Watch-based stress management intervention. Our goal is to evaluate the effectiveness of this intervention, professionally called heart rate biofeedback. Here’s what you need to know:

What You’ll Need:

• iPhone and Apple Watch Application: We will install a custom app on your phone via Apple's TestFlight.
• Heart Rate Monitor: If you’re near NYC or Cornell Tech campus, you can pick it up in person. Otherwise, we’ll mail it to you with a return label for easy return after the study.

Study Details:

• Duration: The study lasts for 7 days, plus an onboarding call (about 1 hour) and an offboarding call (about 1.5 hours)
• Intervention: The intervention will be automatically started and stopped. The intervention will be delivered via your Apple Watch as a subtle wrist vibration. During the intervention, you can continue your daily activities (e.g., working, studying, interacting with others, consuming media without interruption.

Process:

1. Onboarding Call (1 hour):
   • Schedule this once you receive the heart rate monitor.
   • We’ll onboard you to the app, collect baseline heart rate data, and conduct a recorded interview about your current stress management strategies and challenges.
   • You’ll also complete some questionnaires.
   • Duration: About 1 hour.
2. Experiment Stage (7 Days):
   • Wear the heart rate monitor and connect it to the app daily.
   • The monitor will collect heart rate data throughout the day. The phone will collect geolocation every 30-minutes. The geolocation is to help us understand whether the intervention works better indoor, outdoor, in busy towns or in nature.
   • You might receive the intervention for 15 minutes at random times when you are stationary. If it bothers you, you can turn it off.
   • You will receive random push notifications to complete a brief 3-question survey about your stress level, attention, and mental workload. Maximum 8 sets of interventions/surveys per day.
   • At the end of each day, you’ll get a notification to complete a daily survey about your overall feelings.
3. Offboarding Call (1.5 hour):
   • Schedule this after the 7-day period.
   • We’ll conduct another recorded interview about your experience and have you complete some final questionnaires.
   • We’ll guide you on returning the heart rate monitor using the prepaid return package.

Compensation:

The maximum possible compensation is $175.

• Onboarding Call: $10
• Offboarding Call: $20
• Daily Participation:
  • Wearing the heart rate monitor: $7/day
  • Completing each survey set: $0.50 (an additional $0.50 if completed within 5 minutes)
  • End-of-day survey: $1.00
• Bonus:
  • $70 for wearing the heart rate monitor for all 7 days.
  • $10 for completing over 90% of the surveys.