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, Dr. Matacotta works full time at Western University of Health Sciences in the Department of Education. He is an adjunct faculty at Pasadena City College in the Division of Social Sciences.


Introductory 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 psychosocial stress and related factors (e.g., coping, social support, environmental factors, biological factors) play in physical and psychological health and well-being of LGBT populations. This includes examining factors at the individual and social levels related to reducing HIV-associated risk behaviors and fostering HIV prevention, as well as behavioral aspects of HIV testing, engagement, retention, and re-engagement across the HIV care continuum. I am currently researching HIV-related stressors in HIV-positive gay and bisexual men as well as the role HIV treatment as prevention (TasP) may have on reducing HIV-related stigma.

Other Research Topics

I am also actively involved in other areas of research, including: replication in psychological science, interprofessional practice and education, social medicine, and best practices for teaching undergraduate psychology.

I am interested in studying: how healthcare providers can improve the way they deliver care to LGBT patients; psychosocial factors in HIV/AIDS-related outcomes in multi-ethnic groups impacted by this disease; mental health and psychological symptoms of long-term survivors of HIV (pre-HAART LTS known as “longest-term survivors” and post-HAART LTS known as “people living with HIV for more than 10 years and diagnosed after 1996”).  

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