JeeWon Cheong, Ph.D. is an Assistant Professor in the Department of Psychology at the University of Pittsburgh. Her substantive research interests are 1) prevention of drug use and related problem behaviors for adolescents, 2) alcohol use and violence, and 3) effects of alcohol expectancies on alcohol use. Methodologically, she is interested in mediation analysis, growth curve modeling, and latent class trajectory analysis.

Dr. Cheong worked at RIPL since 1995 until she completed her dissertation in August 2002. She was involved in ATLAS, ATLAS 2, and Mediation. She was a Co-PI of the ROAD (Research On Alcohol & Driving) grant and also consulted for ATLAS 2. She can be reached at jcheong@pitt.edu.

Amanda Fairchild, Ph.D. is an Assistant Professor in the Department of Psychology at the University of South Carolina.  Amanda worked on the PHLAME and Mediation grants during her research assistantship at RiPL.  She can be reached at afairchi@mailbox.sc.edu

Matt Fritz, Ph.D. is an Assistant Professor in the Department of Psychology at Virginia Tech. His RIPL involvement included the ATLAS2, PHLAME, and MEDIATION grants. He may be reached at Matt.Fritz@vt.edu

Jeanne Hoffman, Ph.D. is an Assistant Professor at the Department of Rehabilitation Medicine, University of Washington School of Medicine in Seattle, WA. Some of the projects she's working on are: 1) the impact of the new Medicare payment system for traumatic brain injury (TBI) rehabilitation, 2) evaluating a randomized telephone intervention for TBI, 3) evaluating an educational intervention for UTI in spinal cord injury.

Dr. Hoffman started working for RIPL in August 1997 and left in 1999 for a clinical internship at the University of Washington. Her work at RIPL focused on Mediation analyses and she co-managed our first Web Site. She can be reached at jeanneh@u.washington.edu

Jennifer Krull, Ph.D. is an Associate Professor in the Department of Psychology at UCLA.

Dr. Krull is also a consultant on the ATLAS 2 grant assisting Dr. MacKinnon with statistical analyses. She was a graduate student in the RIPL lab from its beginnings in late 1996 until Spring 1997. She can be reached at krull@psych.ucla.edu

Angela Lapin, M.A. is a consultant on the ATLAS 2 grant. She has moved on from RIPL to San Diego, California with her husband and young son. She will be providing statistical analyses on the data set from the ATLAS (Athletes Training & Learning to Avoid Steroids) Program from Oregon Health & Science University in Portland, OR. Ms Lapin was Senior Research Associate with the RIPL lab at it's inception in 1996 to Spring, 1998.

Chondra Lockwood, Ph.D. is currently working as a consultant in Oregon. She was a graduate student in Social Psychology, and her RIPL involvement was with the mediation grant, including investigations of the power to detect mediated effects, comparison of methods to detect mediation, and the effects of nonnormality on mediation tests. She also worked on the ATLAS 2 grant analyzing data from the ATLAS (Athletes Training and Learning to Avoid Steroids) Program in Oregon.  Other research interests included the application of evolutionary theory to modern social behaviors.

Antonio A. Morgan-Lopez, Ph.D. is an Associate Professor of Psychology at the University of North Carolina at Chapel Hill. His general research focus is on the development and application of advances in quantitative methods in the areas of substance abuse etiology, prevention and treatment. He was recently awarded a NIDA-funded Exploratory/Developmental grant (1 R21DA021147-01, beginning 1 April 206) to examine the utility of a) latent class pattern mixture models and b) multiple membership models for handling non-random session-to-session changes in group membership in group-based psychosocial substance abuse treatment trials. He also serves as co-investigator and/or consultant on several grants funded by NIDA, NIAAA, NICHD and CDC as well as research contracts funded by CDC, NIJ and the Department of Defense.

Dr. Morgan-Lopez worked in RiPL from May 2000 to June 2003 on the SATURN and MEDIATION projects. He can be reached at amorganlopez@unc.edu

Liva Nohre, Ph.D. is Senior Epidemiologist with Maricopa County Department of Public Health in Phoenix, Arizona. What is Epidemiology, you might ask? The Maricopa.gov Web Site states: "Q. What does epidemiology mean? A. Epidemiology is the study of the distribution and determinants of health and disease, morbidity, injuries, disability, and mortality in human populations. In a department of public health, epidemiologists keep track of reported disease, births, deaths and do special surveys and studies to get to know the health status of the population."

Dr. Nohre worked at RIPL in the beginning days of 1990 and graduated in August 2001. Her RIPL experience included working with the I-Star Data Set from Indianapolis, Indiana and the ABLE (Warning Label) grant with Dr. MacKinnon.

Krista Ranby, Ph.D. is a Postdoctoral Associate at Duke University in the Center for Child & Family Policy. She is interested in understanding the underlying causes of behavior, with a specific interest in health behavior. As part of RIPL, she had been involved with mediation analyses of the ATHENA (Athletes Targeting Healthy Exercise and Nutrition Alternatives) project. ATHENA is a health promotion and prevention intervention for female middle school and high school athletes conducted by researchers at the Oregon Health & Science University in Portland, OR. She had also been involved in mediation analyses of the PHLAME (Promoting Health Lifestyles: Alternative Models' Effects) program. PHLAME is a health promotion program for firefighters also conducted by researchers from OHSU.  She can be reached at krista.ranby@duke.edu

Ehri Ryu, Ph.D. is an Assistant Professor at Boston College. Her RIPL involvement is with Mediation project, exploring the proportion mediated as an effect size measure of mediation. She can be reached via email at ryueh@bc.edu

Vanessa Ohlrich, M.S. was a research assistant in the RiPL lab from 2007-2009.  She currently works as an Operations Research Associate with ZS Associates.

Marcia P. Taborga, Ph.D. is a Psychology Assistant at Lund & Strachan, Inc. in Santa Monica, CA and a Mental Health Coordinator at the Department of Mental Health/Children's Hospital in Los Angeles, CA.

Dr. Taborga worked in the RIPL lab from 1999 until she left for her internship year at the St. John's Child and Family Development Center in 2002. Dr. Taborga worked primarily on the Mediation grant with particular interests in effect sizes in mediation and also mediators of physical activity programs. Dr. Taborga maintains these interests with ambitions to publish those works in the near future. She can be reached at marciataborga@hotmail.com

Aaron Taylor, Ph.D. is an Assistant Professor at Texas A&M.  His RIPL involvement was with the SATURN (Student Athlete Testing Using Random Notification) project analyzing data from the SATURN Program from Oregon Health & Science University in Portland, OR.  He can be reached at aaron.taylor@tamu.edu  

Felix Thoemmes, Ph.D.  is an Assistant Professor at Texas A&M. His research interests are propensity scores and their application in relevant designs employed by social scientists. He also conducted research in the area of missing data. At RIPL, Felix was involved in the analysis of effects of the PHLAME (Promoting Health Lifestyles: Alternative Models' Effects) program. 

Jason Williams, Ph.D. is a health research analyst in the Substance Abuse Epidemiology, Prevention, and Risk program at RTI International in North Carolina's Research Triangle Park.  Since arriving there in the summer of 2004 he has been heavily involved in evaluation of large multi-site school-based initiatives such as the Safe Schools/Healthy Students program.  Current substantive interests include peer- and school-based influences on effectiveness of school-administered programs and substance use and violence prevention in children and adolescents.

Dr. Williams worked at RIPL from 2000 until June 2004.  His time at RIPL was spent on the MEDIATION project developing and evaluating resampling and distribution of the product tests of mediation and on the ATLAS and SATURN evaluation projects.  He may be contacted at jawilliams@rti.org .   

Myeongsun Yoon, Ph.D. is an Assistant Professor at Texas A&M.  Her RIPL involvement was with the SATURN (Student Athlete Testing Using Random Notification) project analyzing data from drug testing in high schools with Oregon Health & Science University in Portland, OR. She can be reached via email at myoon@tamu.edu

Camden Bay, B.S. is a graduate student in Biostatistics at the University of Iowa.

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Last Modified: February 16, 2010