Development of a Mobile App for Ecological Momentary Assessment of Circadian Data: Design Considerations and Usability Testing

Thomas B Woolf   ¹ , PhD ;   Attia Goheer   ² , MHS, PhD ;   Katherine Holzhauer   ³ , BA ;   Jonathan Martinez   ³ , BSc ;   Janelle W Coughlin   ⁴ , PhD ;   Lindsay Martin   ³ , MSc ;   Di Zhao   ⁵ , MHS, PhD ;   Shanshan Song   ⁶ , PhD ;   Yanif Ahmad   ⁷ , PhD ;   Kostiantyn Sokolinskyi   ⁸ , BSc, MSc ;   Tetyana Remayeva   ⁸ , BSc, MSc ;   Jeanne M Clark   ³ , MD, MPH ;   Wendy Bennett   ³ , MD, MPH ;   Harold Lehmann   ⁶ , MD, PhD

¹ Department of Physiology, Johns Hopkins University School of Medicine, Baltimore, MD, United States

² Department of Health Policy and Management, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, United States

³ Division of General Internal Medicine, Johns Hopkins University School of Medicine, Baltimore, MD, United States

⁴ Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD, United States

⁵ Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, MD, United States

⁶ Division of Health Sciences Informatics, Johns Hopkins University School of Medicine, Baltimore, MD, United States

⁷ Department of Computer Science, Johns Hopkins University, Baltimore, MD, United States

⁸ SROST, Toronto, ON, Canada