Yiyi Wang

Led the development of an LLM-powered chatbot, utilizing passive and check-in data to provide personalized wellbeing insights, trend analysis, and actionable recommendations.
Developed algorithms and machine learning models (e.g., multivariate regression, logistic regression, decision trees, random forests) to predict user wellbeing and behavior, leveraging data from sources such as calendar, Spotify, weather, and activity trackers to enhance predictive accuracy.
Worked on shared insights between two users, providing shared recommendations and identifying correlations and patterns across their wellbeing data
Performed data analysis on user metrics (e.g., website purchase, ad campaign performance, user engagement) to track growth trends and improve user acquisition and retention.
Presented data-driven insights on user growth and engagement in weekly briefings for cross-functional teams, using data visualization tools to support decision-making.
Collaborated with the CTO and product team, applying data analysis findings to inform product improvements, driving enhanced user engagement and retention.

Designed and deployed interactive web pages for research materials, data sharing, user consent, and real-time data collection, supporting over 3,500 participants and enhancing user engagement with research tools.
Led A/B testing for 15 hypothesis-driven longitudinal studies and designed a 3-week online mental health training program, providing personalized interventions to over 2,000 post-secondary students.
Applied advanced statistical analyses and machine learning techniques to user feedback, driving a 25% improvement in user satisfaction through optimized interactions and program design.
Created data visualizations and dashboards to effectively communicate insights and trends to stakeholders, facilitating data-driven decision-making.
Prepared detailed reports and published 5 peer-reviewed papers in high-impact journals.

Acted as a Student Researcher Representative at the Inlight Student Mental Health Research Initiative, representing the University of Toronto, Mississauga campus.
Supported researchers in the development and execution of student engagement strategies for various research projects and laboratories.
Reviewed research grant applications focused on enhancing student mental health and wellbeing.
Facilitated training sessions and consultations to enhance the capacity for student engagement across research initiatives.
Contributed to the preparation of blog posts and presentations aimed at assisting future student adjudicators in the evaluation of grant and fellowship applications.