HCI & mHealth Research

Technology, behavior,
and health.

PhD Candidate at the University of Michigan, School of Information, studying how mobile health technologies can help people build healthy, lasting behavior change.

Soo Ji Serisse Choi
soojc@umich.edu
Portrait of Soo Ji Serisse Choi

About Me

I am a Ph.D. candidate at the School of Information, University of Michigan, co-advised by Dr. Mark W. Newman and Dr. Pedja Klasnja. My research lives at the intersection of human-computer interaction (HCI) and behavioral medicine.

I study how mobile health (mHealth) technologies can support people in building sustainable relationships with health behaviors like physical activity — especially among middle-aged and older adults. By integrating insights from behavioral medicine and psychology with human-centered design, my work aims to understand and design for the underlying mechanisms that drive lasting change (i.e., intrinsic motivation, values and identity) that are both theory-driven and adaptive to users' dynamic and personal needs.

Research Focus

Long-term Behavior Change Physical Activity Intrinsic Motivation Identities & Values Adaptive Interventions Older Adults

Related Fields

mHealth HCI Behavioral Science and Medicine Health Informatics Preventive Medicine Digital Therapeutics (DTx)

Methods

Needs Assessments Participatory Designs Human Centered Designs MRTs JITAIs Factorial Designs RCTs

Selected Publications

2025

Journal Article

Improving Affective Associations with Physical Activity via Message-Based mHealth Interventions: A Proof-of-Concept Trial of WalkToJoy

First author · Journal of Medical Internet Research · August 2025

Choi, S. J. S., Hung, P. Y., Liu, M., Dempsey, W., Newman, M. W., & Klasnja, P. (2025). JMIR, 27, e75792.

2022

Master's Thesis

Improving affective valuations of physical activity with mobile technology: A protocol for a hybrid factorial/micro-randomized trial

First author · University of Michigan Deep Blue · Submitted August 2022

Choi, S. J. (2022). Deep Blue. https://dx.doi.org/10.7302/5862

2022

Journal Article

A Physical Activity JITAI Designed in Partnership With a Predominantly Black Community: Virtual, Community-Based Participatory Design

Co-author · JMIR Formative Research · March 2022

Robles, M. C., Newman, M. W., et al. (2022). JMIR Formative Research, 6(3), e33087.

2021

Journal Article

Evaluation of Visual Induced Motion Sickness from Head Mounted Display using Heartbeat Evoked Potential

Co-author · Virtual Reality · December 2021

Park, S., Kim, L., Kwon, J., Choi S. J., & Whang M. (2021). Virtual Reality. https://doi.org/10.1007/s10055-021-00600-8

2021

Patent

Method and apparatus for measuring emotional contagion

Co-inventor · December 2021

Park, S. I., Whang, M. C., Choi, S. J., Lee, D. W., & Mun, S. C. (2021). U.S. Patent Application No. 16/906,791.

2019

Journal Article

Measurement of emotional contagion using synchronization of heart rhythm pattern between two persons

Second Author · Physiology & Behavior · March 2019

Park, S., Choi, S. J., Mun, S., & Whang, M. (2019). Physiology & behavior, 200, 148–158.

Recent Projects

2025 – Ongoing

Envisioning Future Selves for Middle-aged to Older Adults, Formative Study

In Preparation

2025

MOVIN-HF: Mobile Health Intervention to Increase Activity in Heart Failure — Human-Centered Design Study, Aim 2

NHLBI (NIH) Grant Funded

2024 – Ongoing

ADAPT: mHealth Physical Activity Intervention for Cardiac Rehab Patients — Formative, MRT, and Factorial Study

NIH Grant Funded

2024 – Ongoing

myBPmyLife 2: Multi-behavioral JITAI for Medication Adherence and Hypertension Management

WIRED-L Center, U-M School of Information

2021 – 2024

myBPmyLife: Multi-behavioral JITAI for Hypertension Management — Participatory Design and RCT with Embedded MRT

WIRED-L Center · AHA Funded

2021 – 2024

WalkToJoy: Improving Affective Associations with Physical Activity via Message-based mHealth — Proof-of-Concept Study

Funded by U-M School of Information