William Marelich is an applied quantitative social psychologist with research interests in health psychology, HIV/AIDS, decision-making strategies in health settings, intimate/close relationships, and statistical/methodological approaches in experimental and applied research. He received his BA from California State University, Sacramento, a PhD from Claremont Graduate University, and a National Institute of Mental Health (NIMH) postdoctoral fellowship from University of California, Los Angeles (UCLA). Currently he is Professor of Psychology (California State University, Fullerton), research consultant for UCLA’s Neuropsychiatric Institute (NPI), and Research Scientist for a grant to reduce childhood maltreatment and noncommunicable diseases in Kenya, Africa. His past appointments include Senior Statistician for Health Risk Reduction Projects (Integrative Substance Abuse Programs [ISAP], Department of Psychiatry and Behavioral Sciences, David Geffen School of Medicine at UCLA), and Research Analyst for the Office of AIDS (California Department of Health Services). He has over 90 peer-reviewed publications and monographs, and is author/coauthor of three books including Health Psychology: Alternative Topics, The Social Psychology of Health: Essays and Readings, and Advanced Statistics for Kinesiology and Exercise Science: A Practical Guide to ANOVA and Regression Analyses. He is a two-time recipient of the prestigious Outstanding Scholarship and Creativity Award from the College of Humanities and Social Sciences at his university, and currently serves as an Editorial Board Member for the International Journal of Adolescence and Youth. He also has an interest in Sport Psychology with applications to baseball.