Faculty teaching student information on whiteboard

Faculty with an asterix by their name are able to serve as research mentors. We review applicants on a case by case basis for mentor and program match and qualifications. It is strongly recommended that applicants describe their fit for working with at least two possible mentors.

Jason I. Chen, Ph.D. (core; Psychiatry/VA) in Clinical Psychology from the University of South Florida. Dr. Chen is the Assistant Program Director for the Clinical Psychology PhD Program at OHSU and an Assistant Professor of Psychiatry. He is also a Core Investigator at the VA HSR&D Center to Improve Veteran Involvement in Care (CIVIC) located with the VA Portland Health Care System. He is currently funded on a 5-year, VA HSR&D Career Development Award titled, "Enhancing Social Connectedness Among Veterans at High Risk for Suicide through Community Engagement," (CDA 18-185; IK2HX002787). His research lab, the Connecting Communities for Suicide Prevention Lab (CCSP), studies suicide prevention for high-risk populations with a focus on military veterans, community-based approaches, and help-seeking processes. Clinically, Dr. Chen provides supervision on suicide-specific interventions and adapting evidence-based psychotherapies to acute care and non-traditional settings.

Joshua L Clark, Ph.D. (core; Psychiatry/VA) in Clinical Psychology, American University and postdoctoral fellowship in Polytrauma at VA Portland. Dr. Clark's expertise lies in the assessment and treatment of survivors of complex trauma with both psychological and medical sequelae.  He is a neuropsychologist at VA Portland and provides psychotherapy through a private practice in the community. 

Lauren M. Denneson, MS, Ph.D.* (affiliate; Psychiatry/VA) received her degree in social psychology from Portland State University. She is Associate Professor of Psychiatry at Oregon Health & Science University and a core investigator with the VA HSR&D Center to Improve Veteran Involvement in Care at the VA Portland Health Care System. Dr. Denneson is a social psychologist with training in health promotion and disease prevention. Her research primarily centers on suicide prevention, with special focus areas of patient-centered care and social determinants of health. One of her current projects is a national study examining gender differences in suicide risk, resilience, and recovery using a socio-ecological framework.

Nathan F. Dieckmann, Ph.D. (core; School of Nursing) in Psychology, University of Oregon. Dr. Dieckmann leads the Statistics Core in the School of Nursing. Areas of statistical expertise include structural equation modeling, longitudinal modeling, and psychometrics. Dr. Dieckmann also conducts basic and applied research in the decision sciences and risk communication. His current work is focused on how people understand and use uncertainty in a range of decision contexts. Other areas of interest include examining lay and expert perceptions of conflicting scientific information and trust in science more generally.

Tyler Duffield, Ph.D. (affiliate; Pediatrics) - Specializes in treating children impacted by mild traumatic brain injury or neurologic disease, and their families.

Danny C. Duke, Ph.D. (core; Pediatrics) in Clinical Psychology, University of Florida. Dr. Duke has notable expertise (and research interests) in optimizing empirically supported treatment for youth anxiety, obsessive-compulsive disorder, and PTSD, through the Institute on Developmental Disabilities (IDD), Anxiety Treatment Clinic. He also has specialized expertise in the use habit reversal treatment (HRT) to address trichotillomania, tic/Tourette disorders (CBIT), and the body focused repetitive disorders. He holds a degree concentration in Pediatric Psychology, with clinical and research interests in improving youth and family adjustment to chronic health conditions, and optimizing the transition from pediatric to adult healthcare settings and health condition management (self-care), with particular interests in children and adolescents with type 1 diabetes, and their families.

Susanne W. Duvall, Ph.D. (core; Pediatrics) in Clinical Psychology, University of New Mexico. Dr. Duvall is the Associate Director of Clinical Training for the Clinical Psychology PhD Program. Her expertise lies in neuropsychological evaluation and she enjoys working with children and young adults with special healthcare needs and sees patients through the Autism Program, the Pediatric Brain Tumor Program and the Child Development and Rehabilitation Center.  Research interests include development of executive function and neurocognitive outcomes in many medically complicated populations (premature birth, childhood cancer and brain tumors and autism spectrum disorders).  Dr. Duvall is also very interested in cultural and individual differences that impact coping, functional outcome, diagnosis and treatment in these populations.  

Alice Graham, Ph.D.* (core; Psychiatry) in Clinical Psychology from University of Oregon. Dr. Graham's research focuses on how the early environment influences developing brain systems and risk for mental health disorders. Her work employs MRI beginning in the neonatal period to characterize the developing brain. Her clinical interests lie in employing intervention to prevent or ameliorate effects of stress exposure on children and families. Reach more about Dr. Graham's research

David W. Greaves, Ph.D. (core; Psychiatry/VA), received his Clinical Psychology degree from Brigham Young University. Dr. Greaves has worked primarily in administrative roles for several years, but also provides clinical services in health psychology settings at the VA Portland Health Care System.  He is the Clinical Director of the Whole Health Service at the facility, and is the past Chief of Psychology.

Amy Holley, Ph.D.* (core; Pediatrics) in Clinical Child Psychology, Case Western Reserve University. Dr. Holley's expertise lies in the assessment and treatment of youth with chronic pain and their families. Research interests include how psychopathology and sleep disturbances influence pain-related disability in youth experiencing acute or chronic pain and the identification of mechanisms underlying the development of chronic pain. Dr. Holley is part of the Advancing Research in Pediatric Pain lab.

Marilyn Huckans, Ph.D.* (core; Psychiatry/VA) in Clinical Psychology, George Mason University. Dr. Huckans serves as the Director of Training for Psychology at the VAPORHCS. As a neuropsychologist at the VAPORHCS, she provides neuropsychological assessment, cognitive rehabilitation, and consultation services. Her translational research program integrates human, animal, and in vitro experiments to examine the neuropsychiatric effects of medical, psychiatric and substance use disorders, with a particular focus on the development and discovery of novel treatments for these conditions. Her VA and NIH funded projects have utilized neuropsychological assessment, neuroimaging, and immunological techniques to evaluate clinical outcomes in the context of traumatic brain injury (TBI), posttraumatic stress disorder (PTSD), mild cognitive impairment (MCI), depression, hepatitis C, HIV, alcohol abuse and methamphetamine dependence, with projects primarily aimed at the development of immunotherapies for addiction and cognitive rehabilitation interventions for mild cognitive impairments.

Jeni Johnstone, Ph.D.* (core; Psychiatry) in Psychology, University of Otago, New Zealand; Post-Graduate Diploma, Clinical Psychology, University of Canterbury, New Zealand; MA in Counseling Psychology, Santa Clara University, CA. As a clinician-scientist, Dr. Johnstone conducts clinical trials in integrative treatments (e.g., mindfulness and micronutrient supplementation) for ADHD, mood and behavioral issues in adults and children. She works with patients ranging in age from children through adults, and provides therapy to families in a Family Therapy Clinic.

Thomas Kern, Ph.D. (affiliate; Anesthesiology) - Specializes in helping patients manage chronic pain and other chronic conditions.

Amy Kobus, Ph.D. (core; Psychiatry) in Counseling Psychology, University of Iowa. Dr. Kobus has a general clinical practice and provides both counseling and assessment services to adults, adolescents, couples and families. She has specialized training in health psychology, chronic pain management and primary care psychology. She has considerable experience with young adults, psychological aspects of medical illness, and cultural issues. Dr. Kobus’ previous research has focused on chronic pain, HIV and cervical cancer prevention with the Asian community using mixed-methods and community-based participatory research. Her current research interests are in chronic pain and opioid treatment, behavioral health integration in primary care, and health disparities and community-based research.

Jennifer Loftis, Ph.D.* (core; Psychiatry/VA) in Behavioral Neuroscience and postdoctoral fellowship in Molecular Microbiology and Immunology, Oregon Health & Science University; MA in Clinical Psychology, Fairleigh Dickinson University, New Jersey. Dr. Loftis possesses a unique set of experiences and resources that are ideal for bridging the interrelated disciplines of neuroscience, immunology and molecular biology to tackle mental health disorders from a comprehensive perspective. Her translational research program is focused on investigating the psychoneuroimmunological mechanisms contributing to substance use disorders and neuropsychological impairments (e.g., cognitive deficits and mood disorders) and how immunotherapeutic strategies can be used to treat these conditions. Read more about the Psychoneuroimmunology Research Team and the Methamphetamine Research Center.

Travis I. Lovejoy, Ph.D.* (core; Psychiatry/VA) in Clinical Psychology, Ohio University. Dr. Lovejoy's clinical expertise is in health psychology, behavioral medicine, and substance use disorders. His research interests include optimizing pain management in patients with co-occurring chronic pain, mental health, and substance use disorders, as well as HIV prevention in traditionally underserved populations.

Kristen Mackiewicz Seghete, Ph.D.* (core; Psychiatry) in Clinical Psychology from the University of Colorado Boulder. Dr. Seghete's clinical expertise is in pediatric neuropsychological evaluations and working with women and children who have experienced interpersonal trauma. Her research is focused on neurobiological risk factors for psychopathology assessed primarily through neuroimaging, neuropsychological assessment, and behavioral tasks, and direct translational science that incorporates mechanistic studies and clinical trials. Dr. Seghete is interested in populations at heightened risk due to prior trauma or psychiatric histories, with a particular emphasis on understanding how periods of heightened neuroplasticity, particularly adolescence and the perinatal period, simultaneously confer vulnerability and potential for increased responsivity to intervention. While she has some ongoing work focused on adolescent cognitive brain development, current studies are primarily focused on cognitive and affective changes during the perinatal and postpartum period, including how opioid use may affect this trajectory, and translational studies of mindfulness-based interventions during pregnancy.

Leeza Maron, Ph.D. (core; Psychiatry) Clinical Psychology (specialization in Neuropsychology), University of Florida. Director of Clinical Training. Dr. Maron is also Director of the Adult Neuropsychology Clinic. She provides clinical and forensic neuropsychological evaluations to a broad range of patients with suspected neurocognitive disorders and provides student practicum experiences in that clinic as well. Research interests involve the development and implementation of novel neuropsychological paradigms to study executive dysfunction and attentional failures in those with ADHD and other psychiatric disorders, where she collaborates with Dr. Nigg and others

Suzanne H. Mitchell Ph.D.* (core; Psychiatry/BEHN) - (impulsivity) Ph.D. in Biopsychology, State University of New York –Stony Brook. Dr. Mitchell's research uses neuroeconomic principles to understand choice behavior in healthy normal and patient samples. Studies include the genetic and neurobiological bases and consequences of impulsive and risky behavior. Read more about Dr. Mitchell's Translational Neuroeconomics Lab.

Benjamin Morasco, Ph.D.* (corel Psychiatry/VA), received his Clinical Psychology degree from Saint Louis University. Dr. Morasco provides clinical services in the specialty substance abuse treatment program at the VA Portland Health Care System, with a focus on treating non-substance-related addictive behaviors. His research interests are on improving the safety and effectiveness of pain management interventions, with a specialty interest in treating patients with co-occurring psychological and substance use disorders.

Bonnie J. Nagel, Ph.D.* (core; Psychiatry/BEHN) in Clinical Psychology, with emphasis in Neuropsychology, University of Memphis. Dr. Nagel's clinical expertise lies in pediatric neuropsychological evaluation. Research interests include exploring typical and pathological adolescent brain and cognitive development using structural and functional neuroimaging and neuropsychological assessment techniques. Read more about Dr. Nagel's Developmental Brain Imagining Lab.

Joel Nigg, Ph.D.* (core; Psychiatry) - (ADHD and developmental psychopathyology) Ph.D. in Clinical Psychology, University of California, Berkeley. Dr. Nigg's research focuses on the psychological mechanisms and causes in attention deficit hyperactivity disorder (ADHD). His broad program of research includes maternal-infant early life studies (with Elinor Sullivan), as well as studies of genetics, family factors, and personality and temperament from a longitudinal perspective. Dr. Nigg is Director of the Center for ADHD Research.

Emily Olsen, Ph.D. (affiliate; Pediatrics) - Provides neuropsychological assessment, consultation, and treatment for youth with developmental and medical complexity.

Maya O'Neil, Ph.D.* (core; Psychiatry/VA). Dr. O'Neil received her doctorate from the University of Oregon and completed her internship at the Portland VA. She is a VA Career Development Awardee and past AHRQ K Scholar at OHSU. Her research and clinical work focuses on PTSD, TBI, cognitive rehabilitation, and suicide prevention. She is a neuropsychologist at the VA on the Rural Telemental Health team, is the Co-Director for Research Training for the MIRECC Fellowship Program, and provides clinical and research supervision to practicum students and fellows. She is a quantitative methodologist, leads systematic reviews for the VA, and developed the PTSD-Repository with the National Center for PTSD. In addition to her CDA, she is PI of VA, DoD, and AHRQ grants on PTSD, TBI, and suicide prevention.

Jacob Raber, Ph.D.* (affiliate; BEHN) - (aging) Ph.D. in Molecular Genetics and Virology, The Weizmann Institute of Science. Dr. Raber’s studies the aging brain and causes and mechanisms of neurological disorders and psychological disorders of aging, using both humans and in animal (non-human primate and rodent) models. Research targets include both specific molecular genetic targets, such as apolipoprotein E, and environmental factors, including irradiation, immunotherapy, a high-fat diet, environmental toxins, second-hand smoke, and other stressors.  Based on what is learned in animal models, tests and treatment strategies are being developed to improve brain function in humans suffering from these conditions. Read more about Dr. Raber’s research.

Kim Reynolds, Ph.D. (affiliate; Pediatrics) – Provides psychological assessment and treatment to children with developmental disabilities and chronic medical conditions.

Kimberly Spiro, Ph.D. (affiliate; Pediatrics) - Co-directs the Novel Interventions in Children's Healthcare, which assists youth with chronic medical conditions and their families.

Jason Steward, Ph.D. (affiliate; Psychiatry/VA) - Provides psychological assessment and treatment to trauma survivors within populations of sexual assault, combat, terrorism, maltreatment, and sudden bereavement.

Chris Stauffer, MD* (affiliate; Psychiatry/VA) is an OHSU medical school graduate, psychiatrist, and addiction medicine physician. Dr. Stauffer's lab aims to maximize the benefits of therapeutic alliance and psychotherapy through the adjunct use of social psychopharmacology--such as oxytocin, MDMA, and psilocybin.

Elinor Sullivan, Ph.D.* (affiliate; Psychiatry/ONPRC) - Integrative Physiology, Oregon Health & Science University. Dr. Sullivan’s research examines the influence of the early environment on offspring behavioral and emotional regulation, with an emphasis on behaviors that relate to early precursors of mental and behavioral disorders including attention deficit hyperactivity disorder, autism spectrum disorders, anxiety, and depression. She currently is directing a large new study following a new, large cohort of pregnant women and offspring from before birth to preschool, to track early prediction and mechanisms, in collaboration with Joel Nigg and Jennifer Loftis.

David Wagner, Ph.D. (affiliate; Pediatrics) -  Provides behavioral and family-based therapies for children and families and supervises within the NICH program.

Sara Walker, Ph.D. (core; Psychiatry) in Clinical Psychology, University of California, Santa Barbara, and postdoctoral fellowship in Clinical Neuropsychology from the University of Michigan. Dr. Walker provides clinical services to adults referred for comprehensive neuropsychological evaluations in the Adult Outpatient Psychiatry Clinic at OHSU. Research interests and activities are related to cognitive functioning and quality of life among individuals with cancer.  Dr. Walker is also active in providing disaster mental health services and psychological first aid in the region.

Anna Wilson, Ph.D.* (core; Pediatrics) in Clinical Psychology from University of Washington. Dr. Wilson conducts research on functional outcomes in adolescents with chronic pain with a focus on developing prevention and treatment programs to reduce pain and disability. She also provides behavioral assessment and treatment to children and adolescents through the Pediatric Pain Management and Coping Clinics. Read more about Dr. Wilson's Advancing Research in Pediatric Pain Lab.