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The Twins Project

The Scientists


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Kathryn Paige Harden, Ph.D

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Dr. Paige Harden received her Ph.D. in clinical psychology from the University of Virginia in 2009. She completed her internship at Harvard Medical School and McLean Hospital in Belmont, Massachusetts. She joined the Psychology department at the University of Texas at Austin in August 2009. She is the co-director of The Twin Project at The University of Texas.

For more, visit her lab website.


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Elliot M. Tucker-Drob, Ph.D

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Elliot Tucker-Drob is a Professor in the Department of Psychology and a Faculty Research Associate at the Population Research Center and the Center on Aging and Population Sciences at the University of Texas at Austin. Dr. Tucker-Drob received his PhD in Psychology from the University of Virginia, and has held fellowships at Harvard Medical School and the Max Planck Institute for Human Development. He co-founded and co-directs the Texas Twin Project.

For more, visit his lab website.


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Aditi Sabhlock

Graduate Student

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Aditi is a rising 5th year clinical graduate student in the Harden Lab. After graduating from Duke University, she worked as a Clinical Research Associate at the Duke ADHD program, before entering the Clinical Psychology doctoral program at UT. Here she has grown both her research and clinical interests in child and adolescent wellbeing and psychopathology, particularly externalizing and disruptive behaviors, such as ADHD, oppositional defiance, and conduct disorders. Her current program of research, using the Texas Twin cohort, integrates investigation into the relative genetic and environmental contributions to achievement in middle childhood, focusing on how cognitive functioning and social inequalities relate to childhood academic attainment. She is very excited for Texas twins’ ongoing participation this summer!


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Vanessa Fishel

Project Manager

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Vanessa began as a Project Manager for the Texas Twin Project in 2021. She is from central Pennsylvania and went to college at the University of Pittsburgh (aka “Pitt”). After graduating with a B.S. in Psychology, she stayed in Pittsburgh and worked for both Pitt and UPMC Western Psychiatric Hospital doing research. Her work in Pittsburgh included running MEG/EEG & MRI scans to study first episode psychosis, and studying the efficacy of reduced-nicotine cigarettes on smoking cessation. Vanessa is fascinated by many areas of psychology and is particularly interested in alcoholism and the various factors that contribute to recovery and sobriety. Someday she would like to pursue a PhD in Clinical Psychology.


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Liza Vinnik

Data Scientist

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Liza Vinnik graduated from the University of Texas at Austin with a B.A.in Psychology with honors, and a minor in Philosophy. Prior to joining the Texas Twin Project, she completed her undergraduate thesis, under the guidance of Dr. Elliot Tucker-Drob, examining genetic and environmental links between different domains of conduct problems and academic achievement. She worked as a project coordinator on the Texas Twin Project from 2019-2021 and subsequently transitioned to a data scientist role.