Temporal Stability of Smartphone Use Data: Determining Fundamental Time Unit and Independent Cycle

Yuan-Chien Pan   ^{1, 2} , MSc ;   Hsiao-Han Lin   ¹ , MSc ;   Yu-Chuan Chiu   ³ , MD ;   Sheng-Hsuan Lin   ⁴ , ScM, ScD, MD ;   Yu-Hsuan Lin   ^{1, 5, 6, 7} , MD, PhD

¹ National Health Research Institutes, Institute of Population Health Sciences, Miaoli County, Taiwan

² Department of Psychology, National Taiwan University, Taipei, Taiwan

³ MacKay Memorial Hospital, Department of Psychiatry, Taipei, Taiwan

⁴ National Chiao Tung University, Institute of Statistics, Hsinchu, Taiwan

⁵ National Taiwan University Hospital, Department of Psychiatry, Taipei, Taiwan

⁶ National Taiwan University, Department of Psychiatry, College of Medicine, Taipei, Taiwan

⁷ National Taiwan University, Institute of Health Behaviors and Community Sciences, College of Public Health, Taipei, Taiwan