← Yixuan "Coda" Shi

Scholarly

Philosophy, public affairs, psychological research and practice.An intellectual obsession with the psyche, a care for its well-being.

Questions I keep returning to

  • The precision of psychological constructs, the reliability and validity of the instruments that measure them, and whether either holds across cultures.

    Invariance across sex, age and culture is the precondition for comparing a construct at all — and most screening instruments have never been tested on a sample large enough to settle it.

  • The nature of death and of psychic suffering, and what separates them.

    Their phenomenological structure and their value are not the same, yet both may be filed under the same heading of bad experience. How different cultures give them meaning and find somewhere to put them; what they mean to the living; and, more concretely, how loss, mourning and trauma change a personality — and how personality in turn shapes what a person feels of those experiences, what they make of them, and what they can integrate.

  • Whether the need for a self-identity is itself a culturally specific one

    If the answer is yes, then the many theories of personality and development that set a stable, integrated self-identity as the goal of development all carry a cultural boundary they never declare. What I most want to examine is the part meaning plays in it: whether it can work as a mechanism for maintaining self-continuity, so that a person still experiences themselves as coherent across time even when identity, role or values have changed.

  • How mindfulness-based, psychodynamic and existential interventions actually work.

    How the efficacy of mindfulness, existential and traditional-cultural therapies can be established, and the conditions under which each holds; and how, in practice, to relieve another person’s suffering and their fear of death.

Academic record

Tsinghua University

Aug 2026 — Present

Department of Psychology and Cognitive Science

Research Assistant, Center for Cultural Psychology · Beijing

  • Supports the Center's daily research operations: project management, document organisation, meeting and academic-event coordination, and external communications.
  • Contributes to interdisciplinary projects spanning cultural-psychology theory, culturally grounded psychological interventions, depression neuroimaging and multimodal intervention, and applications of artificial intelligence to mental health.
  • Assists with literature review, study-design documentation, ethics materials, participant recruitment, and collection of questionnaire, behavioural, neuroimaging, physiological, and wearable-device data.
  • Supports MRI scanning, TMS intervention, behavioural assessment, data quality control, and preliminary analysis after required training; contributes figures and manuscript material under team supervision.
  • Principal investigator: Prof. Chao-Gan Yan.

Southern Methodist University

Spring 2026 — Present

Department of Psychology

Independent Research — Lead Analyst · Dallas, TX

  • Leads Phase I on the full analytic sample (N = 10,080) and Phase II on a ~1,500 subsample testing Sex × Age invariance: measurement invariance of the PHQ-9 and GAD-7 in a Shanghai tertiary-hospital psychiatric outpatient sample, addressing a gap where Chinese invariance studies typically sit below N = 1,000.
  • Built a reproducible R pipeline in tidyverse, psych, lavaan, semTools, and flextable, following Putnick & Bornstein (2016) and Fischer & Karl (2019) reporting standards; Phase II adds ordinal multi-group CFA with the WLSMV estimator and an MNFA extension.
  • Completed end-to-end data cleaning, sample accounting, Table 1 demographics, and a missingness audit confirming complete PHQ-9/GAD-7 item data; produced pairwise cross-tabulations with Cramér's V and a three-tier data-quality flagging system supporting primary and sensitivity analyses.
  • Manuscript in preparation with Dr. Quanfa He; targeting an APS / APA / SRP poster and a clinical-methodological journal, Fall 2026.

Southern Methodist University

Oct 2025 — Present

Delta Adult Attachment & Personality Development Lab

Research Assistant · Dallas, TX

  • Co-piloted two Sonar studies, coded 500 entries for an ongoing friendship research project, and cleaned 1,500 raw questionnaire entries for a longitudinal volitional personality-change study using SPSS syntax.

Providence City Council

Jan 2025 — May 2025

Brown University Watson Institute

Policy in Action Project Researcher · Providence, RI

  • Conducted comparative inclusionary-zoning research across East Palo Alto, Fairfax County, and further U.S. cases; used HUD and local housing data to produce choropleth and dot-density maps, and contributed to the final difference-in-differences analysis.
  • Co-authored a policy brief on zoning and sustainable parking policy with actionable recommendations, and presented findings to Providence City Council officials.

Education

Brown University

Jun 2024 — Jun 2025

Master of Public Affairs · Providence, RI

Econometrics, probability, data analysis and visualisation, public policy, corporate finance, public administration.

Harvard University

Aug 2024 — Dec 2024

International Business / Trade / Commerce (non-degree) · Cambridge, MA

Cross-registration during the Brown MPA.

University of California, Irvine

Sep 2020 — Dec 2023

Bachelor of Arts in Philosophy · Irvine, CA

Dean's List for all eight quarters. Philosophy of mind, ethics, symbolic logic, general psychology, advanced statistical methods.