Joshua J. Matacotta, PsyD, CAHIMS


Dr. Matacotta trained as a clinical psychologist with an emphasis in health psychology. He has trained and worked in community mental health, university student health centers, hospitals, and public schools. Currently, he is employed full time at Western University of Health Sciences and is part of adjunct faculty in the Social Sciences Division of Pasadena City College.


Introductory Psychology
Social Psychology
Health Psychology
Research Methods in Psychology
LGBTQ Psychology
Interprofessional Practice & Education


My research is broadly focused on the intersection of psychological processes and physical health and disease. I am interested in the role of psychosocial and socioeconomic stress on physical and psychological health and well-being, especially in people of color, sexual minorities, and gender minorities. This includes examining factors at the individual and social levels that affect HIV prevention as well as behavioral aspects of HIV testing, patient engagement, retention, and re-engagement across the HIV care continuum. Other areas of interest include ADHD in adults, social determinants of health, the role of telehealth in treating opioid use disorders, and replication of psychological science.

Other Research Topics

I am interested in studying:

  • Approaches to supporting medical and health sciences students and health care providers in delivering culturally competent care to LGBTQ people.

  • Behavioral strategies that reduce HIV-related stigma, prevent the spread of HIV, and improve the lives of people living with HIV. 

  • Social psychological dimensions of economic injustice: poverty and deep poverty.  

Professional Memberships

  • Association for Psychological Science (APS)

  • American Psychological Association (APA)

  • Society for the Teaching of Psychology (APA Div 2)

  • Society of Behavioral Medicine - SBM Champion

  • Healthcare Information and Management Systems Society (HIMSS)

NIH Grant Review Member

Study Section: Division of AIDS, Behavioral and Population Sciences (DABP)
Small Business - Psycho/Neuropathology, Life Span Development, and STEM Education
Integrated Review Group: Risk, Prevention and Health Behavior (RPHB-12)
Review Dates: 03/07/2019; 06/28/2018

Student Opportunities

Undergraduate and graduate students interested in gaining research experience and/or developing a topic for a project or thesis should visit the IBHRI internship website to find more information about opportunities at IBHRI. Undergraduate students at Pasadena City College should inquire about registering with me for Psych 20: Independent Study. You may also contact me directly by email.


Josh Matacotta, PsyD
Professor, Behavioral Scientist

ResearcherID: J-9203-2015