Lab Members

We are a cognitive neuroscience lab studying the mental processes involved in reasoning, decision-making, and memory. We study the relationship between brain and behavior in healthy individuals and people who have psychiatric or neurological impairments. We use behavioral measurements, cognitive interventions, and neuroimaging techniques in our research. We are located at the Center for BrainHealth at The University of Texas at Dallas and the Department of Psychiatry at The University of Texas Southwestern Medical Center.

Faculty

Daniel Krawczyk, PhD

Dan Krawczyk, PhD

Principal Investigator
Email: [email protected]

View Dr. Krawczyk’s CV
View Dr. Krawczyk’s faculty profile at UT Dallas
View Dr. Krawczyk’s faculty profile at UT Southwestern


Research Scientist

Kihwan Han

Kihwan Han
Email: [email protected]

Dr. Kihwan Han works in Dr. Daniel Krawczyk’s lab where he analyzes MRI-based neuroimaging data of individuals with traumatic brain injury (TBI) and individuals receiving rehabilitative interventions for TBI. Dr. Han integrates these neuroimaging variables with their neuro-psychological measures.

Prior to joining the Center for BrainHealth, he was a postdoctoral research associate at Washington University in St. Louis for two years after he received his PhD in Electrical Engineering from Purdue University in 2011. Dr. Han’s research interests include characterizing the brain networks of individuals with TBI and other diseases and disorders as well as utilizing advanced MRI techniques to develop novel methodologies for MRI analysis.

Dr. Han’s website


Graduate Students

Zhengsi Chang

Zhengsi Chang
PhD Student — Psychological Sciences Program — UT Dallas
Email: [email protected]

Zhengsi Chang is a Psychological Sciences doctoral student in Dr. Daniel Krawczyk’s lab. She is currently exploring the possibility of incorporating technologies (e.g., serious games, virtual reality) into research to study human reasoning and the impact of Traumatic Brain Injury on daily functioning. Prior to joining Center for Brain Health, she received a Bachelor of Science in Biological Sciences from China Agriculture University and a Master Degree in Education from The University of Texas at Arlington.


Richard Cole

Richard Cole
MS Student — Psychological Sciences Program — UT Dallas
Email: [email protected]

Richard Cole received his BA in Psychology from the University of Arizona and his MS in Applied Psychology from Walden University. He joined the Krawczyk Reasoning Lab in Fall 2016 after completing 8 years in the U.S. Army.

Richard’s interests include TBI/rehabilitative techniques, decision-making and emotions, and therapeutic methods. His goal is to receive a Doctorate in Clinical or Counseling Psychology and continue working with Veterans and researching topics that affect the military community.

His current research investigates the link between decision making and cognitive and emotional bias — in the context of perspective-taking and affective priming. Additionally, he is assisting with the Expedition Project — a remotely-based cognitive intervention, to better reach Veterans who struggle with TBI-related symptoms.


Matt Kmiecik

Matt Kmiecik
PhD Student — Cognition and Neuroscience Program — UT Dallas
Email: [email protected]

Matt received his BS in Psychology from Loyola University Chicago where he became interested in how language interacts with human thinking, reasoning, and problem-solving. His work utilizes neuroimaging techniques, such as fMRI and EEG/ERP, to understand the cognitive mechanisms of reasoning and how these relate to neural functioning. He is also interested in how traumatic brain injuries affect cognitive constructs, such attention and semantic memory, to inform and develop cognitive rehabilitation programs. Current projects include: improving methods for characterizing semantic and lexical properties of word generations in neuropsychological assessments, understanding multivariate relationships between the blood-oxygen-level-dependent (BOLD) response and white matter microstructure in individuals with mild-moderate TBI, and understanding how humans reason with complex relational structures.

Matthew Kmiecik’s website


Michael Lundie

Michael Lundie
PhD Student — Cognition and Neuroscience Program — UT Dallas
Email: [email protected]

Michael Lundie started his academic career at Southern Methodist University, where he received a BA degree in Philosophy with a minor in history. Shortly thereafter, he completed an MA in Neurophilosophy at Georgia State University, where he engaged in interdisciplinary work on cognitive architecture and domain-general cognition.

Now a first-year PhD student in the Cognition and Neuroscience program, Michael works in Dr. Krawczyk’s Reasoning Lab at the Center for Brainhealth. His current research interests include using neuroimaging techniques, such as fMRI, to investigate the neural correlates of relational and analogical reasoning, the effects of biases (e.g., the Framing Effect) on judgment and decision-making, and the impact of traumatic brain injury on executive function.


David Martinez

David Martinez
PhD Student — Psychological Sciences Program — UT Dallas
Email: [email protected]

David Martinez works in Dr. Krawczyk’s lab where he assists research on cognitive performance, behavioral reports, clinical assessments, and neuroimaging data on healthy individuals and those with mild-to-moderate traumatic brain injury (TBI). David has also co-designed an analogical reasoning task to better assess reasoning performance in both healthy and clinical populations.

Before joining the Center for BrainHealth, David worked in clinical neuropsychology and neuroimaging research at the University of Texas Health Science Center in San Antonio. David has a Master of Science in applied cognition and neuroscience from The University of Texas at Dallas and a Bachelor of Arts in psychology with a minor in history from Baylor University. David’s research interests include the exploration of brain structure, cognitive changes, and improvements following cognitive intervention in mild-to-moderate TBI, along with finding better techniques to identify neuropsychological deficits in clinical populations.


Linda Nguyen

Linda Nguyen
PhD Student — Cognition and Neuroscience Program — UT Dallas
Email: [email protected]

Linda is a second-year PhD student in the Cognition and Neuroscience program. She is interested in social neuroscience, specifically the intersection of neuroscience, psychology, and genetics and how it informs implicit and explicit behavior and personality. She is also interested in the role of culture in behavior and personality. To study the intersection of these areas, she uses a variety of techniques including functional magnetic resonance imaging, implicit and explicit behavioral measures, and multivariate statistics. She earned her Master’s degree in Applied Cognition and Neuroscience at UT Dallas, and her Bachelor’s degree in Neuroscience with a minor in Journalism at Baylor University.


Jelena Rakic

Jelena Rakic
PhD Student — Cognition and Neuroscience Program — UT Dallas
Email: [email protected]

Prior to joining Dr. Krawczyk’s lab, Jelena received her Bachelor of Arts in political science and psychology from The University of Texas at Arlington. As a research coordinator in Dr. Krawczyk’s lab, her responsibilities include neuropsychological testing, MRI scanning, and fMRI data analyses. In 2017, she graduated with a Master of Science in applied cognition and neuroscience from the University of Texas at Dallas. Currently, she is pursuing a PhD in cognition and neuroscience. Her research interests include traumatic brain injury, reasoning, social cognition, neural networks, emotion, and hormones.


Research Staff

Tiffani Jantz

Tiffani Jantz
Research Coordinator: Center for BrainHealth
Email: [email protected]

Tiffani Jantz Fox received her BA in Psychology and Child Development and her MS in Applied Cognition and Neuroscience with top honors from The University of Texas at Dallas. She is passionate about research and has had previous experiences working in The Friendship Project Lab, Speech Perception Lab, and the Motes Cognition Lab, all at The University of Texas at Dallas. She is also on staff as a therapist at Children’s Health on the Inpatient Psychiatric Unit and brings mental health patient experience to the lab. Tiffani is fascinated by the human mind and hopes to better understand traumatic brain injuries through her experiences in the Krawczyk Lab. Current research interests include functional neuroimaging, neuropsychology, and innovate problem-solving. Eventually, she would like to attend a Physician Assistant program in addition to earning her MBA degree.


Jameson Miller

Jameson Miller
Research Coordinator: Center for BrainHealth
Email: [email protected]

Jameson Miller has been with Dr. Krawczyk’s research team since 2014, with primary focus on TBI (Traumatic Brain Injury) within our military and veteran population. His current project is Expedition, a virtual reality game-based TBI intervention. The Expedition project is remotely deployable, meaning that our current and former service members are able to participate from home, and set their own activity schedule to a large degree.

Jameson applies his unique background and experience to be of continued service to our nation’s wounded warriors. His career with the U.S. Army began in the field artillery, later transitioning to medic and laboratory scientist. As a civilian, Jameson continued his work in clinical and forensic pathology and biochemical genetics before attending UT Dallas and later joining the Center for BrainHealth’s commitment to serving our current and former military service members.


Barry Rodgers

Barry Rodgers
Research Coordinator: Center for BrainHealth
Email: [email protected]

Barry is a member or the Traumatic Brain Injury research team and is responsible for data analysis and management. Prior to coming to the Center for BrainHealth he worked in the Office of Institutional Access and Equity at Southern Methodist University as the Data Administration Analyst. Before that he spent 12 years working in the private sector as a Programmer and Data Analyst in the commercial building industry. Barry holds a Master of Science degree in experimental psychology and his research interests include learning, memory, reasoning, social cognition, and statistics.