People of CANLab


Tor Wager, Ph.D.

Tor Wager is the director of the Cognitive and Affective Control Laboratory and Associate Professor of Psychology and Neuroscience at the University of Colorado, Boulder. His research program focuses on the brain mechanisms underlying expectations and placebo effects, and their influences on brain systems involved in pain, emotion, and motivation. He is actively involved in the emerging field of brain-body medicine, which integrates brain activity with physiological activity in the body to promote understanding of health and disease. Dr. Wager is also actively involved in developing new analysis methods to enhance our ability to understand brain function using human neuroimaging. His resume includes over 60 published articles, and he is currently the principal investigator or co-investigator on 8 funded grants, 4 of which are NIH-sponsored. He also serves on the editorial boards of several scientific journals.


Anjali Krishnan, Ph.D.

Anjali Krishnan has been a post-doctoral research associate in the Cognitive and Affective Neuroscience Lab since September 2011. She did her Ph.D. in Cognition and Neuroscience at The University of Texas at Dallas. Her research interests include developing Principal Components-based multivariate statistical methods, statistical analysis of neuroimaging data, and experimental design. Her domain interests include arithmetic ability, semantic categorization, decision-making and emotion.

Leonie Koban, Ph.D.

Leonie started her postdoctoral fellowship in the Cognitive and Affective Neuroscience Lab in November 2012. She studied Psychology at the University of Konstanz (Germany) where she became interested in affective neuroscience. For her PhD project at the University of Geneva (Switzerland), she used ERPs and fMRI to investigate how the brain detects interpersonal conflict and monitors action in dyadic social settings. Her current work extends this line of research to social influences on pain, by exploring the brain mechanisms underlying the effects of social interactions and affective context on subjective experience as well as the neurophysiological processing of pain.

Stephan Geuter, Ph. D.

Stephan joined the the Cognitive and Affective Neuroscience Lab as post a postdoctoral research associate in July 2014. During his doctoral training at the University Medical Center Hamburg-Eppendorf in Hamburg, Germany, he worked on cognitive modulation and various physiological measures of pain. He is interested in the modulation of our sensory experiences through contexts, expectations and social influences. He uses psychological, physiological, and neurophysiological measures to investigate these processes at different levels.

Jessica Andrews-Hanna, Ph.D.

Jessica is a post-doctoral fellow in the Institute of Cognitive Science at the University of Colorado at Boulder. In 2009, she received her Ph.D. at Harvard University in the Department of Psychology where she examined the neural underpinnings of introspective processes including remembering the past, imagining the future, and reflecting on the mental states of one's self and other people. Jessica is continuing this line of work in the Cognitive and Affective Neuroscience lab and is involved in a research project investigating the cognitive and affective processes underlying compassionate behavior. Additionally, she is conducting a related line of research examining how individuals regulate their internal thoughts, as when attention must be directed toward or away from such thoughts.

Luke Chang, Ph.D.

Luke is a postdoctoral fellow in the Cognitive Affective Neuroscience Laboratory since Fall 2012. He completed an MA in psychology at the New School for Social Research and a PhD in clinical psychology at the University of Arizona where he studied social and affective decision-making. He completed his predoctoral clinical internship training in behavioral medicine at the University of California Los Angeles. Broadly, his research is focused on understanding the neurobiological and computational mechanisms underlying social interactions. He has combined reinforcement learning and game theoretic modeling approaches with fMRI to understand the neurocomputational processes involved in affective motivations in social decision-making (e.g., guilt and anger) and also how people learn to trust a relationship partner from their initial impressions and actual interactions. His current work is focused on developing computational models of treatment expectation effects (e.g., placebo responses) and investigating how pain and emotions are regulated through social interactions.

Mathieu Roy, Ph.D.

Mathieu Roy is a post-doctoral fellow in the Cognitive and Affective Neuroscience Lab since fall 2009. He did his Ph.D. in psychology at the University of Montreal on the cerebral and cerebro-spinal modulation of pain by music and emotions. His research interests broadly encompass the cerebral mechanisms of pain perception and its modulation by various psychological factors, in healthy individuals and in patients with chronic pain. He is also interested in musical emotions and their therapeutic effects. His current research projects comprise the cerebral correlates of pain avoidance learning and the modulation of pain by transcranial magnetic stimulation (TMS).

Marina Lopez-Sola, Ph.D.

Marina Lopez-Sola has been a post-doctoral research fellow at the Cognitive and Affective Neuroscience Lab since January 2012. She completed her PhD in Neuroscience in the Hospital Universitario del Mar-University of Barcelona, Faculty of Medicine, where she investigated the neural substrates of pain processing dynamics in major depression and chronic pain. Her extensive clinical neuroscience/neuroimaging training involved the areas of imaging methods (fMRI), and the study of the neural basis of chronic pain, disorders of affect (major depression) and anxiety (OCD, social phobia and simple phobias), psychopathy and disorders of motivation and action, including addiction and Parkinson's Disease. Her research focuses on understanding and isolating the brain mechanisms and psychological processes that underlie human suffering at the interface between emotional distress and chronic pain. Her main research questions are: how does the brain give rise to experiences of suffering at the neural systems level? And, how can we ultimately recover the fine equilibrium associated with healthy subjective emotional experience in its various forms? Her interest in understanding the brain pathophysiology of disorders involving emotional suffering and chronic pain is motivated by the observation that the same symptom (e.g., anxiety) reported in different contexts or by different individuals may emerge as the result of different neural etiologies. A multilevel effort to establish parallels between pathological brain processes on the one hand, and psychopathological profiles across people and clinical entities on the other, may greatly advance the understanding of mental health and the paths to human suffering and recovery.

Graduate Students

Choong-Wan (Wani) Woo

Wani is a graduate student in the CAN Lab at CU Boulder since Fall 2011. His undergrad major was biological sciences, and he got his master's degree in clinical psychology at Seoul National University in South Korea. After three-year clinical training in the Psychiatry Department at Seoul National University Hospital, he became eager to do more research on cognitive and affective neuroscience. He has broad interests in the mind-body relationship as well as emotion-cognition interactions. Also he has a great interest in bridging basic and clinical science (i.e., translational research).

Yoni Ashar

Yoni is a doctoral student interested in the brain, emotions, and clinical interactions. He is investigating the placebo response in the treatment of depression and the effects of Compassion Meditation on behavior and brain function. He has a B.S. in Computer Science.

Helena Yardley

Helena is a graduate student in Integrative Physiology, Neuroscience, and Behavioral Genetics. After obtaining her B.S. in Psychology, she worked as a research assistant for three years at the Martinos Center for Biomedical Imaging in Boston studying how anesthesia modulates sleep/wake states through fMRI, MEG, and EEG. Some of her current research focuses on fMRI meta analyses, the effects of social judgement on cognitive processing, and utilizing genome wide association studies to determine how genetic markers drive neural activity and contribute to behavior.

Jennifer Felder

Jennifer is working on a project studying brain pathways underlying compassionate action, and analyzing data for a study investigating neural basis of vagal tone dysregulation in depression. Jennifer is a graduate student in Sona Dimidjian's lab, in which she studies the effects of meditation on attention. For the two years prior to graduate school Jennifer worked at the Duke-UNC Brain Imaging and Analysis Center using fMRI to investigate effects of treatment in depression and autism.

Scott Schafer

Marianne Reddan

Marianne Reddan is a graduate student in the CAN lab since Fall 2013. She completed her undergraduate in Psychology in the laboratory of Elizabeth Phelps at NYU, and then continued to investigate fear in the laboratory of Daniela Schiller at Mount Sinai School of Medicine. Marianne is interested in emotion: its underlying neural mechanisms, its effects on cognition and memory, and the behaviors it motivates. More specifically she is interested in empathetic processing and prosocial behavior, cognitive control of negative emotions, anxiety and post-traumatic stress disorder, and the protective effects of social support.

Research Assistants

Jacob Parelman

Jacob Parelman is a Junior Undergraduate Psychology student. He is very interested in emotion, pain and perception. He is assisting Postdoc Yoni Ashar in his research on compassionate behavior, and Postdoc Marina Sola in her research on emotional states and pain. Jacob hopes to attend graduate school to continue his studies in the field.

Megan Powell

Megan is a research assistant in the Cognitive and Affective Neuroscience Lab since January 2012. She is currently working on her undergraduate degree in psychology and philosophy at CU Boulder. She plans to attend graduate school in psychology after teaching English in South America.

Zeb Delk

Zeb Delk is a research assistant and programmer in the Cognitive and Affective Neuroscience Lab. She started in March of 2014, after working for several years as a software engineer. She has a BS in Mathematics from Colorado State University. Zeb is interested an applied math and the computational techniques needed to process and analyze brain imaging data.

Emma Hitchcock, BA

Emma Hitchcock earned her BA from Yale University in 2014. Her senior thesis in Religious Studies combined her interests in religious belief and psychology. As a research assistant in the Memory and Cognition Lab, she did work on internal thought and the effects of emotion and aging on memory. Some of the topics that she finds most exciting include: the dynamics between attention to inner thoughts and the external world, the mind-body relationship, cognitive control, and the influence of memory on attention and emotion.


Brandon Tutt, MA

Brandon's academic background is in anthropology where he got his Master's studying Polynisian family structures and professional development of rural elementary school teachers. His focus moved over to medical research where he developed databases for the Prevention Research Center. Brandon then became a part of the Department of Family Medicine where he managed studies ranging from adolescent outreach to primary care practice improvement to a residency program in Rwanda.

Hedwig Eisenbarth, Ph.D.

Hedwig was a post-doctoral fellow in the Cognitive and Affective Neuroscience Lab from December 2012- January 2015. She is now a Lecturer at the University of Southampton (UK). She did her PhD in clinical and biological psychology at the University of Wuerzburg (Germany) on emotional detachment in psychopathy, as assessed via self-report and emotion detection tasks. She has a clinical training in cognitive behavioral psychotherapy. Her research interests refer to the relationship between aggression, emotion processing, traumatic experiences, psychopathy and social behavior. Her current research focuses on emotion and pain processing and it's relationship with individual differences, using behavioral, psychophysiological and self-report measures as well as fMRI.

Jeny Sills

Jenifer Sills is a research assistant working on an fMRI/Compassion Meditation study and a pain perception study. She graduated from CU with a BA in psychology in 2005 and is currently applying to medical school. She is interested in the application of neuroscience research, especially pain and pain relief, in the medical field.

Joe Wielgosz

Joe took a while to get around to cognitive neuroscience, studying mathematics, putting in time as a software developer, traveling and living around the globe, and studying spirituality and meditation. He couldn't shake the science bug though, and joined the CANlab in 2008 to learn more about neuroimaging and the study of emotion. During that time he worked on subliminal priming, opioid-mediated analgesia, and machine-learning analysis of pain responses. No amount of Matlab and E-Prime debugging could dissuade him, and he is now a clinical graduate student in the lab of Richard Davidson, at U. Wisconsin-Madison, studying emotion regulation and affective disorders.

Elizabeth Reynolds Losin, Ph.D.

Liz Losin has been a postdoctoral research associate in the Cognitive and Affective Neurosceince Lab since August of 2012. She completed her doctoral training in UCLA's Interdepartmental Neuroscience Program where she investigated the neural underpinnings of social and cultural learning via imitation. Broadly, her research interests lie in combining her training in anthropology and neuroscience to explore the bidirectional relationship between sociocultural factors and the brain. In her current research she will be using fMRI and multivariate analyses methods to investigate social and cultural influences on behavioral and neural responses to pain.

Brandin Williams

Brandin is a senior psychology major at the University of Colorado. He is currently helping Research Assistant Yoni Ashar with studies on compassionate behavior. Brandin is interested in various aspects of cognitive science including philosophy, linguistics, and computer science and wants to continue to be involved in the field of psychology after he graduates.

Natalie Johnston

Hedy Kober, Ph.D.

Hedy was one of Tor's first graduate students at Columbia University, and the occasional babysitter for Tor's former dog, Wookie. She is now an assistant professor at Yale.

Damon Abraham

Damon completed his undergraduate education in 2000 at Colorado State University in Fort Collins. After working in the financial sector for several years, he changed careers to become a research assistant in Columbia's Social Cognitive Affective Neuroscience Lab under the direction of Tor Wager. In 2010 he joined Jennifer Mangels' Dynamic Learning lab as a CUNY graduate student and is broadly interested in how top-down cognitive and affective control processes interact with bottom-up physiological and emotional processes to generate behavioral outcomes.

Namema Amendi

Tal Yarkoni, Ph.D.

Liane Schmidt, Ph.D.

Liane is a postdoctoral fellow in both the Cognitive and Affective Neuroscience Laboratory and in the Learning Lab at Columbia University since Spring 2010. She completed her MS in Biology at Albert-Ludwigs University Freiburg in Germany, and her PhD in Cognitive Neuroscience at Pierre and Marie Curie University Paris in France. During her doctoral training she was studying incentive motivation by using behavioral testing and functional imaging in healthy humans and patients with neurological and psychiatric diseases. She is interested in why humans sometimes surpass themselves even when their basic competencies remain unchanged. Her research aims to understand how incentives change brain and behavior and the implications for health and disease.

Lauren Atlas, Ph.D.

Lauren completed her PhD in July, 2011. Her research focuses on understanding how expectancies shape affective experience. Using a thermal pain model and new analysis strategies developed in the lab, her work in the CAN lab focused on how perception is affected by information about the stimulus (cue effects), information about the context (placebo effects), opioid treatment (drug effects), and interactions among all of these factors. She is currently a postdoc working with Elizabeth Phelps at NYU, where she aims to extend this work to other affective domains and to clinical populations.

Pa'Ticia Mac Moion

Pa'Ticia Mac Moion has been researching in the Cognitive and Affective Neuroscience Lab since July 2011 working with the fMRI scanner on "Pain and Decision Making." She received her Bachelor of Science at the University of Utah in Sociology with a minor in Psychology, and was Pre-med. She accomplished a research project "Colorado's Deaf and Hard of Hearing Mental Health and Substance Abuse Action Plan," as a Graduate Research Assistant. She also researched in the Emotion Regulation lab at the University of Denver working with one of the main researchers on a project on "MBCT and Depression" and other projects as well, including "Emotion Regulation and Reactivity among Adults with History of Self-Injury (2011)." She is hoping to start a Masters in Cognitive Neuroscience.

Jenna Reinen

Jenna is a graduate student in the Columbia division of the Cognitive and Affective Neuroscience Lab. After studying biology at Duke, she worked in biomedical, cognitive, and clinical research for several years. Her current research examines the neural and cognitive bases of learning, memory, and decision making, and the impact of affective and motivational states upon them. Specifically, some of her current research focuses on the way that pain affects decisions, and how the experience of pleasure affects memory in patient populations.

Julie Spicer, Ph.D.

Brad Stevens

Kate Dahl

Kate was a research coordinator in Tor's lab at Columbia. She is now at Northwestern University doing a PhD in Clinical Psychology with a focus on children & adolescents.

Lauren Leotti, Ph.D.

Lauren was a graduate student in the lab at Columbia, finishing in 2009. She is currently a post-doc at the Social & Affective Neuroscience Lab at Rutgers University.

Nick Peterson

Nick is assisting with research on compassion action. He has a B.A. in History and plans to pursue doctoral research in clinical/counseling psychology. Among many other things, he's interested in Axis-I disorders, behavioral neuroscience, psychotherapy, dancing, music, religion, contemplative traditions, nutrition, etymology/languages, and soy lattes.

Marieke Jepma, Ph.D.

Marieke Jepma is a post-doctoral fellow in the Cognitive and Affective Neuroscience Lab since June 2011. She did her PhD in cognitive psychology at Leiden University, the Netherlands, on the role of the noradrenergic system in human cognition. Her current research focuses on the cognitive, neural and computational mechanisms of pain-related learning and decision making. Specifically, she is currently investigating the roles of experience and instructions in pain-avoidance learning, using behavioral measures, fMRI and computational models of reinforcement learning.

So Young Choe

So Young Choe joined Canlab on July 2011 after she finished her Master's in Psychology at Seoul National University. She has designed pain empathy/emotional pain observation experiment and has been analyzing fMRI data in the lab. Her Master's thesis is about the relationship between emotional disposition and utilitarian judgment and her fMRI data has been analyzed in Canlab way in collaboration with people in the lab for a publication. Her first publication in America, "Who Makes Utilitarian Judgments?", predicting utilitarian judgment with trait emotions, was published in Judgment and Decision Making on October 2011. She is hoping to get in a PhD program to research affective neuroscience.

Jason Buhle

Asa Pingree

Luka Ruzic

Luka Ruzic is a research assistant in the Cognitive and Affective Neuroscience Lab since Summer 2011. He got his B.A. in psychology and philosophy from CU Boulder in 2007 after which he worked for several years in the Banich lab on fMRI analysis of executive function. In the CANlab Luka is working on a study of the effects of feeling of control, expectancy, and agency on pain experience. He is interested in neuroscientific and computational approaches to topics that concern evaluative/normative representations from moral judgment and decision-making to affect and reinforcement learning models.