INTRODUCTION
My research consists of topics in human-computer interaction (HCI) with an emphasis in behavioral science. In the past, I studied human empathy during human-to-human and human-to-machine interaction as a research intern at the Emotion Contents Technology Research Center of Sangmyung University, South Korea. Currently, I am a UX research assistant at the WIRED-L Center, University of Michigan Ann Arbor while pursuing a Master of Science in Information (MSI) with a specialization in UX/HCI.
[Improving the Everyday]
Through my research, I am interested in combining the practice of Human-computer Interaction (HCI) such as UX design and research, data science, and behavioral science to improve ways we navigate the world by encouraging small and positive changes in our daily lives.
I wish to create systems and structures that ultimately guide and empower each user's lifestyle through personal data in mobile technology. The big keyword for my research interest is health & wellness and daily habits where the focus is on their behavioral patterns that affect physical and mental health. Specifically, I am interested in context-aware systems where machines are able to understand and communicate information with humans as well as each other to help our lives to become more aware, efficient, and fulfilling. As such, my topics of interest are:
Personal Data / Health Informatics
- Habits & Behavioral change
- Self awareness, Metacognition
- Physical and Mental Health
- Mobile Health Applications
Ubiquitous Systems
- Context-aware Systems, Smart Environment, Mobile technology
- Seamless integration of VR/AR/XR Technology and Interface
PUBLICATION
1) Measurement of emotional contagion using synchronization of heart rhythm pattern between two persons: Application to sales managers and sales force synchronization.
- Second Author
- Physiology & Behavior Journal (2.517 IF)
- Physiology & Behavior Journal (2.517 IF)
Abstract:
The purpose of this study was to measure emotional contagion, determine its direction, and compare the intensity between positive and negative contagion using the synchronization of heart rhythm pattern (HRP). A total of 64 undergraduate students (32 women and 32 men) participated in the experiment, and were randomly categorized as either leaders or followers. Followers were required to imitate the facial expression (happy and sad) of the leader (emotional contagion) or of a facial image (emotional non-contagion). We found that emotional contagion significantly increased the correlation coefficient between leaders and followers' HRP for both positive and negative emotions, but emotional non-contagion did not. There was no significant difference in leaders' HRP before and after contagion, while followers' HRP changed significantly. During emotional contagion, the correlation coefficient for negative emotion was significantly higher than for positive emotion. The proposed method could measure low or high emotional contagion and determine its direction quantitatively. In our application study, a sales manager (leader) transmitted a positive emotion to a sales employee (follower), and the groups are organized as HEC or LEC (high or low emotional contagion) groups by evaluating the intensity of emotional contagion based on HRP synchrony between them. HEC group's performance was enhanced compared to the LEC group.
The purpose of this study was to measure emotional contagion, determine its direction, and compare the intensity between positive and negative contagion using the synchronization of heart rhythm pattern (HRP). A total of 64 undergraduate students (32 women and 32 men) participated in the experiment, and were randomly categorized as either leaders or followers. Followers were required to imitate the facial expression (happy and sad) of the leader (emotional contagion) or of a facial image (emotional non-contagion). We found that emotional contagion significantly increased the correlation coefficient between leaders and followers' HRP for both positive and negative emotions, but emotional non-contagion did not. There was no significant difference in leaders' HRP before and after contagion, while followers' HRP changed significantly. During emotional contagion, the correlation coefficient for negative emotion was significantly higher than for positive emotion. The proposed method could measure low or high emotional contagion and determine its direction quantitatively. In our application study, a sales manager (leader) transmitted a positive emotion to a sales employee (follower), and the groups are organized as HEC or LEC (high or low emotional contagion) groups by evaluating the intensity of emotional contagion based on HRP synchrony between them. HEC group's performance was enhanced compared to the LEC group.
Keywords: Emotional contagion; Synchronization; Heart rhythm pattern; Team performance; Sales marketing.
Park, S., Choi, S. J., Mun, S., & Whang, M. (2018). Measurement of emotional contagion using synchronization of heart rhythm pattern between two persons: Application to sales managers and sales force synchronization. Physiology & Behavior.
- First author
- HCI Korea 2019 Conference
- HCI Korea 2019 Conference
Abstract:
The purpose of this study was to develop a multi-sensory product using an entry-level 3D printer. This study developed a prototype of the product, which functions as a tumbler type cup while being responsive to the environmental sound and motion of the cup. A survey for usability test was performed in questionnaires by 20 subjects on a 5-point Likert scale. The product has been designed and modeled by the Autodesk Fusion 360 software and printed on an entry-level 3D printer 3DISON PRO with low-cost PLA filaments. The design of the product was made based on usability and convenience, and contains three main detachable parts of a cap, body, and support (sensor case).
The purpose of this study was to develop a multi-sensory product using an entry-level 3D printer. This study developed a prototype of the product, which functions as a tumbler type cup while being responsive to the environmental sound and motion of the cup. A survey for usability test was performed in questionnaires by 20 subjects on a 5-point Likert scale. The product has been designed and modeled by the Autodesk Fusion 360 software and printed on an entry-level 3D printer 3DISON PRO with low-cost PLA filaments. The design of the product was made based on usability and convenience, and contains three main detachable parts of a cap, body, and support (sensor case).
Keywords: 3D Printing, Multi-sensory, Modeling.
Choi, S. J., Lee, S. R. & Won M. J. (2019). Development of ‘LightMeCup’ Prototypes Using Entry-Level 3D printers. HCI Korea 2019. Paper presented at the Proceedings of the HCI Korea 2019 Conference of the HCI Society of Korea (pp. 932-937).
UNDER REVIEW / READY FOR SUBMISSION
1) Early-stage, Community-based Design Process To Understand User Needs For Hypertension Management mhealth Intervention: The Wired-L Study
- Co-author
Keywords: Mobile health intervention; Hypertension management; Physical activity; Participatory design process
2) Quantitative difference of facial movement between gender during daily emotion interaction.
- Second co-author
Summary:
Facial movement has become the center of attention in research on human behavior. However, less findings of facial movement led to characterize emotion expression according to gender. Daily dynamics of emotion has been not described sufficiently during interaction by recent results from static emotion in laboratory study. Therefore, this study aims to determine difference of facial movement between genders in the condition of continuous emotion interaction in daily life. Fifteen graduate students at aged average 26.4±1.57 year participated in this experiment, and their facial movement were measured during emotion interaction tasks such as positive, negative, neutral, high-arousal, and low-arousal. Facial movement were analyzed at twenty AUs by time series data. This study will be a guideline of continuous emotion interaction for emotion expression of virtual avatar.
Facial movement has become the center of attention in research on human behavior. However, less findings of facial movement led to characterize emotion expression according to gender. Daily dynamics of emotion has been not described sufficiently during interaction by recent results from static emotion in laboratory study. Therefore, this study aims to determine difference of facial movement between genders in the condition of continuous emotion interaction in daily life. Fifteen graduate students at aged average 26.4±1.57 year participated in this experiment, and their facial movement were measured during emotion interaction tasks such as positive, negative, neutral, high-arousal, and low-arousal. Facial movement were analyzed at twenty AUs by time series data. This study will be a guideline of continuous emotion interaction for emotion expression of virtual avatar.
Keywords: Facial movement; Continuous emotion interaction; Emotion expression; Virtual avatar.
3) Evaluation of Visual Induced Motion Sickness from Head Mounted Display using Heartbeat Evoked Potential: A Cognitive Load-Focused Approach
- Third author
Summary:
The motion sickness is strongly related to the information processing capacity or resources in brain from the multi-sensory stimuli caused by experiencing the VR content. The purpose of this research was to develop the method for measuring the motion sickness using the HEP phenomenon, and to propose a new indicator for evaluating the motion sickness (cognitive function). Twenty-eight undergraduate volunteers of both genders (14 females) participated in this study, and watched the VR content of both 2D and HMD for 15minutes. The response for HEP measures such as alpha power, latency, and amplitude of HEP first and second components between 2D and HMD were compared based on paired t-test and ANCOVA. The HEP measurement method can be used to quantify the motion sickness, and to determine the optical viewing for VR content with fewer negative side effects.
The motion sickness is strongly related to the information processing capacity or resources in brain from the multi-sensory stimuli caused by experiencing the VR content. The purpose of this research was to develop the method for measuring the motion sickness using the HEP phenomenon, and to propose a new indicator for evaluating the motion sickness (cognitive function). Twenty-eight undergraduate volunteers of both genders (14 females) participated in this study, and watched the VR content of both 2D and HMD for 15minutes. The response for HEP measures such as alpha power, latency, and amplitude of HEP first and second components between 2D and HMD were compared based on paired t-test and ANCOVA. The HEP measurement method can be used to quantify the motion sickness, and to determine the optical viewing for VR content with fewer negative side effects.
Keywords: Motion Sickness, Heartbeat Evoked Potential (HEP), Heart-Brain Synchronization, Cognitive Load.
4) Non-contact empathy measurement based on micro-movement
- Second author
Summary:
The motion sickness is strongly related to the information processing capacity or resources in brain from the multi-sensory stimuli caused by experiencing the VR content. The purpose of this research was to develop the method for measuring the motion sickness using the HEP phenomenon, and to propose a new indicator for evaluating the motion sickness (cognitive function). Twenty-eight undergraduate volunteers of both genders (14 females) participated in this study, and watched the VR content of both 2D and HMD for 15minutes. The response for HEP measures such as alpha power, latency, and amplitude of HEP first and second components between 2D and HMD were compared based on paired t-test and ANCOVA. The HEP measurement method can be used to quantify the motion sickness, and to determine the optical viewing for VR content with fewer negative side effects.
The motion sickness is strongly related to the information processing capacity or resources in brain from the multi-sensory stimuli caused by experiencing the VR content. The purpose of this research was to develop the method for measuring the motion sickness using the HEP phenomenon, and to propose a new indicator for evaluating the motion sickness (cognitive function). Twenty-eight undergraduate volunteers of both genders (14 females) participated in this study, and watched the VR content of both 2D and HMD for 15minutes. The response for HEP measures such as alpha power, latency, and amplitude of HEP first and second components between 2D and HMD were compared based on paired t-test and ANCOVA. The HEP measurement method can be used to quantify the motion sickness, and to determine the optical viewing for VR content with fewer negative side effects.
Keywords: Motion Sickness, Heartbeat Evoked Potential (HEP), Heart-Brain Synchronization, Cognitive Load.