Silvia Lopez-Guzman, M.D., Ph.D.| Principal Investigator

Dr. Lopez-Guzman received her M.D. from Pontificia Universidad Javeriana in Bogotá, Colombia and completed her Ph.D. in Neuroscience at New York University’s Center for Neural Science. She joined NIMH as Chief of the Unit on Computational Decision Neuroscience and became a NIH Distinguished Scholar in 2021. Dr. Lopez-Guzman also holds a joint appointment with the National Institute on Drug Abuse (NIDA), where she is part of the Translational Addiction Medicine Branch.

Morkeh Blay-Tofey, M.D., M.B.A. | Clinical Fellow 

Dr. Blay-Tofey is a Clinical Fellow at the National Institute of Mental Health (NIMH). Before joining NIMH, he completed three-years of Psychiatry Residency at Baylor Scott and White Medical Center. He holds a B.A. in History of Science and Medicine from Yale College and a dual M.D./M.B.A. degree from Texas Tech Health Sciences Center School of Medicine. Dr. Blay-Tofey's interests lie in the neural mechanisms of decision-making and learning, particularly when affected by psychopathology, and the development of digital interventions to enhance mental health accessibility and quality.

Chang-Hao Kao, Ph.D. | Data Scientist

Dr. Kao is a Data Scientist in the Unit on Computational Decision Neuroscience. Before joining the lab, he was a Postdoctoral Associate at Yale University. He earned a Ph.D. in Psychology from University of Pennsylvania. His research interests focus on computational processes and neurobiological mechanisms in decision-making and subjective feelings. He is also interested in how psychiatric symptoms affect these processes. Outside of the lab, he enjoys reading, cooking and bouldering

Clara Haeffner, B.S. | Postbaccalaureate Fellow

Clara graduated from the University of Wisconsin-Madison with Comprehensive Honors in Neurobiology in 2023. There, she studied interactions among affective chronometry, neuroscience, and well-being. Her undergraduate work culminated in an honors thesis analyzing associations between lifetime stress history, hippocampal and amygdala volumes, and cortisol responses to acute psychosocial stress. She plans to pursue a Ph.D. to further investigate the intersection of affective and cognitive neuroscience, especially pertaining to how these processes interact with individual differences in life experience and psychopathology. Outside of the lab, Clara spends her time doing yoga, hiking, and finding live music.

Alexander Maksiaev, B.A. | Postbaccalaureate Fellow

Alexander graduated from the University of Virginia in 2024 earning a Bachelor of Arts with Highest Distinction in Cognitive Science concentrating in Neuroscience. He also completed a second major in Computer Science. Alexander’s main research interests sit at the intersection between mental health, affect, language, and computation – a combination he used in his Distinguished Majors Program thesis in which he conducted exploratory sentiment analysis on textbooks with autism content. After his time at CDN, Alexander plans to pursue a Ph.D. to further investigate how computation can be used to answer questions about human emotion. Outside of research, Alexander enjoys illustration, crochet, and running.

Sydney Trowbridge, B.S. | Postbaccalaureate Fellow

Sydney graduated from the University of California, Santa Barbara in 2022 with a Bachelor of Science in Biopsychology and a Minor in Art. Since graduating, she has spent time investigating applications of machine learning in neuroscience. Sydney has a very broad interest in the field of neuroscience, but is particularly interested in the role of large-scale brain networks in psychopathology and how machine learning and neuroscience can be mutually beneficial. After her time with CDN, Sydney intends on pursuing a Ph.D. in neuroscience. In her free time, she enjoys spending time with her pitbull, Daisy.

Justine Trudeau, B.S. | Postbaccalaureate Fellow

Justine graduated from The Catholic University of America with honors in Psychological and Brain Sciences, minoring in French and Francophone Studies. Her research interests include cognition underlying social behavior, as well as integration of sense and perceptual information in decision making. Her undergraduate thesis investigated deficits in empathy for distress and inhibitory control as mechanisms underlying aggression. After conducting research in CDN, she plans to pursue a Ph.D. in the fields of psychology or affective neuroscience. Outside the lab, Justine likes to spend time hiking and biking, doing fine arts, and watching theater with friends in D.C.