x y
@xy01
I build validated statistical models and data applications for behavioral health research.
United StatesWhat I'm looking for
I'm building validated statistical methods and data applications for adolescent digital well-being research through an Arizona State University collaboration.
I designed and built ScreenMe, a Streamlit application with validated pipelines and Plotly views for within-person, between-person, and app-event timeline analyses. I also integrated the OpenAI Responses API using aggregate-only context, storage-disabled requests, deterministic fallbacks, user-safe errors, and automated tests.
At Mindstrong Health, I led development of statistical measures from human-smartphone interactions to support continuous monitoring of depression and anxiety risk. I partnered with product, clinical, research, and engineering teams to align validation strategy, technical feasibility, and product goals.
My work draws on doctoral training in quantitative psychology and foundations in statistics, computer science, and control-system engineering. I translate complex longitudinal, time-series, physiological, and behavioral data into reliable decisions while clearly communicating assumptions and limitations across disciplines.
Experience
Work history, roles, and key accomplishments
Lead statistical methodology and application development for adolescent digital well-being research, including study design, data collection, validation, analysis, and reporting. Developed methods for multimodal irregular time-series data and built the ScreenMe Streamlit application with OpenAI API integration.
Designed and implemented multimodal studies integrating self-report, physiological, and facial-expression signals to measure adolescent mental health. Developed rigorous analysis plans for complex behavioral data and communicated statistical choices across disciplines.
Senior Data Scientist, Passive Sensing Research Lead
Mindstrong Health
Jan 2021 - Dec 2023 (2 years 11 months)
Led development of statistical measures from human-smartphone interactions to support continuous monitoring of depression and anxiety risk. Partnered with product, clinical, research, and engineering teams to align analytical requirements and validation strategy.
Designed studies of youth self-regulation and digital-media behavior using intensive longitudinal sequences of smartphone screenshots. Modeled digital-content and behavioral sequences to identify patterns and relationships.
Research Associate
Beijing Academy of Educational Sciences
Jan 2011 - Dec 2015 (4 years 11 months)
Designed stratified sampling for city-scale school surveys and analyzed student data to assess learning motivation and school satisfaction.
Quantitative Analyst
Bayview Asset Management, LLC
Jan 2009 - Dec 2011 (2 years 11 months)
Developed quantitative models for mortgage-backed-security pricing using individual payment and default histories.
Education
Degrees, certifications, and relevant coursework
Pennsylvania State University
Ph.D., Quantitative Psychology
Ph.D. in Quantitative Psychology with a focus on Human Development and Family Studies.
Columbia University
M.A., Statistics
M.A. in Statistics from Columbia University.
Tsinghua University
M.S., Computer Science
M.S. in Computer Science from Tsinghua University.
Tsinghua University
B.S., Control System Engineering
B.S. in Control System Engineering from Tsinghua University.
Availability
Location
United StatesAuthorized to work in
Portfolio
vwendy.github.io/xiaoyang-websiteJob categories
Skills
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