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Washington State University

Meet the IMPACT Lab


Principal Investigators

Research Staff

Research Coordinator Cassandra Watters

Cassandra Watters

Research Coordinator

Cassandra is a Research Coordinator in the IMPACT lab. After graduating from the University of Arizona in 2020, she worked as a Lab Coordinator in the Child Cognition Lab at UArizona. Cassandra then completed a fellowship at Ochanomizu University in Tokyo, Japan, investigating mental healthcare provider training in Japan. Her primary research interests include adolescent psychopathology and substance use prevention.

Impact research coordinator Clara Hill

Clara Hill

Research Associate

Clara is a research associate in the IMPACT lab in the Department of Human Development, on the Pullman campus. She received her MPH from the University of Washington. In addition to co-managing lab activities, she is the PI of the First Years Away from Home Handbook Dissemination project and the DBHR Prevention Fellowship. She also coordinates several other research and evaluation projects, including the CPWI Evaluation, mostly related to substance use prevention. Her academic background is in public health, psychology, and English literature, and her research interests also include mental health promotion, and early childhood development, and parenting across the lifespan.

Dr. Heather Terral

Data Analyst

Heather is a prevention scientist with a focus on health promotion and equity. She earned her MS and Ph.D. in prevention science from the University of Oregon and currently lives in Portland, Oregon. She is also an experienced human services educator with a passion for supporting student learning and development, especially in research and methods. Her research at the policy-level has examined how racial, rural, and class disparities were present in policies informing Oregon school wellness environments.  She is currently supporting data analysis on the Community Prevention and Wellness Initiative and the Culture, Longitudinal Patterns, and Safety Promotion of Handgun Carrying Among Rural Adolescents projects.

Graduate Students

IMPACT Lab PhD Student Elizabeth Purser


B.A. Psychology, minor in Criminal Justice, University of Texas at El Paso, 2019

Areas of emphasis:

  • Positive youth development
  • Adolescent anti-social behavior and relationships
  • Evidence-based Program Development and Implementation
  • Familial influences on development
  • Prevention science in adolescence

IMPACT Lab PhD Student Erica Doering


M.S. Health and Wellness Coaching, Creighton University, 2016

B.S. Nutritional Sciences, University of Nebraska, Lincoln, 2013

Areas of Emphasis

  • Boredom and leisure
  • Healthy lifestyle
  • Substance use
  • Prevention science
  • Positive youth development
  • Adolescence and emerging adulthood


B.A. Psychology, Graceland University

M.A. Psychology, Clinical Science, University of Northern Iowa

Areas of emphasis:

  • Dissemination and implementation of evidence-based interventions
  • Adaptation of evidence-based programs for underserved communities
  • Mental health promotion
  • Mental health literacy

Katherine Bruzios


M.S. Clinical Psychology, Rivier University, 2015

B.S. Psychology, High Point University, 2013

Areas of Emphasis

  • School-based Prevention
  • Positive Youth Development
  • Dissemination and Implementation Science
  • Evidence-based Program Adaptation
  • Translational Research



Undergrad Students

Reece Schulke

Past Undergraduate Students

  • Alexis B. Schmeirer, WSU ’20
  • Courtney Goff, WSU ’19
  • Eric Harrison, University of Alabama ’21
  • Elvia Garcia, WSU ’21
  • Kayli Elwyn, WSU ’20
  • Leanna Totten, WSU ’20
  • Matthew Sionson, WSU ’19
  • Melanie Simpson, WSU ’21
  • Sabrina DiGennaro, WSU ’20
  • Taylor Larkin, WSU ’22
  • Carolina Vargas, WSU ’22
  • Rittick Nandy, WSU ’23
  • Gavin Mina, WSU ’23