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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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Sofia Semyrenko

Project Manager


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Sofia joined the Lifespan Development Lab in the summer of 2023. She graduated from the University of Texas at Austin with a B.S. in Neuroscience Scholars and a certificate in Forensic Science. Before joining the team, she worked as a research assistant at the Epigenetics, Development and Neuroscience Lab, studying the effects of environmental factors on working memory of the offspring. She wrote an experimental thesis examining the impact of prenatal exposure to a bisphenol mixture on anxiety-like behavior in rodents. Sofia is primarily interested in the epigenetic mechanisms underlying susceptibility and development of mental health disorders as a result of childhood trauma. She would like to continue pursuing her academic interests and apply for a PhD program in the future.


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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.