👋🏼 I’m an HCI researcher at the intersection of technology, behavior, and health.
I am currently a Ph.D. student studying health informatics at the School of Information, University of Michigan. Co-advised by Dr. Mark W. Newman and Dr. Pedja Klasnja, I study how mobile health (mHealth) interventions can help people build a healthy and positive relationship with physical activity for long-term behavior change.
CVMy research focuses on how mobile health (mHealth) interventions can help people build a sustainable, long-term relationship with health behaviors, such as physical activity.
Some keywords describing my research:
- Human computer interaction (HCI) in health technologies
- User experience design & research (UX)
- Personal informatics
- Mobile health (mHealth) technology & Wearables
- Persuasive technology
- Just-in-time Adaptive Interventions (JITAIs)
- Scalable adaptive interventions
- Preventive health
- Behavioral change (e.g., Physical activity)
- Affective valuations (i.e., enjoyment towards behavior)
- Sustainable lifestyle change
- Dynamic changes in patient/user needs
- Identity-based attitudes & self-perception of aging
- Impact of age on physical activity behavior
- Chronic condition management
Adobe Suite (Photoshop, Illustrator, InDesign, XD, Premiere Pro, After Effects), Figma, Sketch,
Webflow
Factorial experimental design, Micro-randomized trial design, Interview, Survey, User testing, Design sprint, Participatory design, Heuristic Evaluation, etc.
HTML/CSS, JavaScript, Python, Stata, R and basic Unity
Evaluating An mHealth Just-In-TimeAdaptive Intervention (JITAI) For Managing Hypertension: Findings On Dynamic Shifts In User Needs And Perceived Value Of Intervention Support
Submitted on October 2023 (Under review)
Choi, S. J., Mishra S. R., Klasnja P., Dorsch M. P., Skolarus L., Golbus J. R., Nallamothu B. K., Newman M. W. (2024). Evaluating An mHealth Just-In-TimeAdaptive Intervention (JITAI) For Managing Hypertension: Findings On DynamicShifts In User Needs And Perceived Value Of Intervention Support. CHI 2024. (Under review)
Improving affective valuations of physical activity with mobile technology: A protocol for a hybrid factorial/micro-randomized trial
Submitted on August 2022
Choi, S. J. (2022). Improving affective valuations of physical activity with mobile technology: A protocol for a hybrid factorial/micro-randomized trial. Deep Blue. https://dx.doi.org/10.7302/5862
A Physical Activity Just-in-time Adaptive Intervention Designed in Partnership With a Predominantly Black Community: Virtual, Community-Based Participatory Design
Published on March 2022
Robles, M. C., Newman, M. W., Doshi, A., Bailey, S., Huang, L., Choi, S. J., ... & Skolarus, L. E. (2022). A Physical Activity Just-in-time Adaptive Intervention Designed in Partnership With a Predominantly Black Community: Virtual, Community-Based Participatory Design Approach. JMIR Formative Research, 6(3), e33087.
Evaluation of Visual Induced Motion Sickness from Head Mounted Display using Heartbeat Evoked Potential: A Cognitive Load-Focused Approach
Published on December 2021
Park, S., Kim, L., Kwon, J., Choi S. J., & Whang M. (2021). Evaluation of visual-induced motion sickness from head-mounted display using heartbeat evoked potential: a cognitive load-focused approach. Virtual Reality. https://doi.org/10.1007/s10055-021-00600-8
Method and apparatus for measuring emotional contagion
Published on 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.
Measurement of emotional contagion using synchronization of heart rhythm pattern between two persons: Application to sales managers and sales force synchronization
Published on March 2019
Park, S., Choi, S. J., Mun, S., & Whang, M. (2019). Measurement of emotional contagion using synchronization of heart rhythm pattern between two persons: Application to sales managers and sales force synchronization. Physiology & behavior, 200, 148-158. https://doi.org/10.1016/j.physbeh.2018.04.022
Development of ‘LightMeCup’ prototypes using entry-level 3D printers
Presented on January 2019
Choi, S. J., Lee, S., & Won, M. (2019). Development of ‘LightMeCup’ prototypes using entry-level 3D printers.
HCI Korea 2019 Conference of the HCI Society of Korea (pp. 932-937).
Ph.D. in Information
Master of Science in Information
Bachelor of Fine Arts
UX Research Assistant, WIRED-L Center
September 2020 ─ Present
- Contributed to a Just-in-time adaptive intervention (JITAI) study aimed to reduce risk and enhance self-management of blood pressure for hypertensive individuals through smartphones and wearbles
- Low-, Mid-, and High-fidelity prototyping and designing of the myBPmyLife mobile application
- Conducted participatory design sprint, interviews and feedback sessions to identify user needs & test mobile application
- Developed storyboards, user flows, and interaction maps
- Conducted exit interviews to gain feedbacks on user experience, and generate design implications for how to improve JITAIs to better adapt to dynamic user needs
UX Design Intern, Office of University Development
May 2021 ─ January 2022
- Contributed to improving the storytelling experience within the website targeted towards university donors using multi-media approach
- Contributed to improving the internal workflow of designing the storytelling experience
- Contributed to improving the user experience of the website within the Wordpress environment with a focus on accessibility and responsive design
Reserach Intern, Emotion Contents Technology Research Center
May 2016 ─ November 2019
- Studied empathic and physiologic human-to-human interactions as well as human-computer interactions with focus on emotion
- Presented findings weekly and published articles
- Conducted a study experiment for gaze tracking of face-to-face social interaction
- Developed an affective multi-sensory device using Arduino & 3D printer
UX Design Intern, Conpulpo
June ─ November 2019
- Contributed to a project used to assist in therapy sessions for PTSD patients
- Designed and developed a GUI interface with a real-time avatar using Unity3D
