Department of Psychology

arc lab members


Dr. Peter Mezo


For more information on Dr. Peter Mezo, please navigate here.

Graduate Student Researchers

Hannah Herc, msc


  • Degree: MSc Mental Health Research (University of Nottingham)
  • Degree in Progress: Ph.D. Clinical Psychology
  • 2017-2022
  • Graduate Student
  • Email:

Hannah earned her Bachelor’s degree in Psychology from Kent State University in 2014, and her Master’s degree in Mental Health Research from The University of Nottingham (U.K.) in 2016. Prior to joining the ARC Lab, Hannah worked as a Psychology Research Lab Manager at Kent State University (2014-2015) and most recently as a Behavioral Health Counselor at both the Psychiatric Intensive Care Unit at St. Clare's Behavioral Health Hospital and for Comprehensive Behavioral Healthcare Group Homes (2016-2017), located in New Jersey which were group homes for patients transitioning from the state psychiatric hospital in New Jersey. Hannah recently earned her Masters of Arts in Clinical Psychology from The University of Toledo in December, 2019. 

Hannah's primary research interests focus on third-wave cognitive and behavioral therapies and mechanisms of change with in those therapies. Current research areas include mindfulness, mindfulness meditation, school-based mindfulness interventions, acceptance and commitment therapy, and metaphor use.  

Publications & Presentations

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Justin Leiter-Mcbeth, M.A.


  • Degree: B.S. Psychology (Kent State University), M.A. Psychology (University of Toledo)
  • Degree in Progress: Ph.D. Clinical Psychology
  • 2018-2023
  • Graduate Student
  • Email:

Justin earned his Bachelor's degree in Psychology from Kent State University in 2016. Prior to joining the ARC Lab, Justin volunteered in multiple labs at Kent State, worked as a neurofeedback technician, and was employed as a research specialist through Western Psychiatric Institute and Clinic in Pittsburgh, Pennsylvania.

Justin's primary research interests focus on interoception, mindfulness, and physiology. He also hopes to create a better understanding of how visceral signals affect psychopathology.

Publications & Presentations

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Jason Liou, B.S.


  • Degree: B.S. Computer Information Systems (California State Polytechnic University, Pomona)
  • Post-Baccalaureate: Certificate Pre-Clinical Psychology (Northwestern University)
  • Degree in Progress: Ph.D. Clinical Psychology
  • 2019-2024
  • Graduate Student
  • Email:

Jason earned his Bachelor’s degree in Computer Information System at Cal Poly Pomona in 2005, and his Post Baccalaureate Certificate in Pre-Clinical Psychology from Northwestern University in 2018. Prior to joining the ARC Lab, Jason worked as a Research Assistant in the Child and Adolescent Mood Lab (2017 - 2019) and the Northwestern University Visual Thinking Lab (2016 - 2018). Jason also Interned for the Rush Neuro-Behavioral Center (2017 - 2018) in Skokie, IL and volunteered for the City of Hope National Medical Centre (2018) in Duarte, CA.

Jason’s primary research interest focus is on the mechanisms of change relating to suicidal ideation, suicidal behavior, stress, and depression.

Publications & Presentations

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Noelle Warfford, B.S.

 Noelle Warfford

Noelle earned her Bachelor’s degree in Psychology with a second major in Music from Roanoke College in 2019. Prior to joining the ARC Lab, she was a research assistant in the Psychology Department at Roanoke and defended her Honors senior thesis titled “Reliability of the Computerized-Trail Making Test, Two Alternative Cue Choice Task, and Computerized-Circle Bisection Task."

Noelle’s primary research interests broadly include psychological assessment and psychometrics, as well as serious and chronic mental illness, especially schizophrenia-spectrum disorders. She is interested in studying ways of assessing self-regulation and self-monitoring skills in populations with serious mental illness.

Publications & Presentations

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Teona Velehorschi, B.A.


Teona earned her Bachelor's degree in Psychology from the University of Michigan in 2019. Prior to joining the ARC Lab, Teona was a research assistant in the Emotion and Self-Control Lab (UM Psychology Department) and the Kid Power Lab (UM Psychiatry Department), and was employed as a research technician/lab coordinator in the Clinical Psychophysiology Lab at Michigan State University. 

Teona's primary research interests focus on the effects of stress and anxiety on physical and mental health, and how we can use various emotion regulation strategies and psychosocial interventions to alleviate the associated negative symptoms. Additionally, she hopes to incorporate her research interests in the field of sport psychology. 

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research assistants

 Joshua Cahill 

Joshua is a junior pursuing his bachelor’s degree in Psychology. He joined the ARC lab to get first-hand psychological research experience. Joshua is primarily interested in anxiety and depressive disorders, as well as the effectiveness and applicability of cognitive therapies. His current future plans are to get his masters degree in counseling and become a licensed clinical mental health counselor (CMHC).

 Grayling Keune 

Grayling is a senior pursuing his bachelor’s degree in Psychology. He joined the ARC Lab to broaden his understanding of psychological research relating to adaptive regulation and coping skills. His interests focus on third-wave behavior and cognitive therapies and severe mental illness in youth. His secondary interests focus on memory and suggestibility in youth. Upon graduation he plans to move further within the field of psychology and pursue a graduate degree in Clinical Psychology. 

Graduate alumni

Post-doctoral Fellows & Residents

  • Kelsey Pritchard, Ph.D. (2021)
    • Current Placement: Post-doctoral Fellow (Clinical Health Psychology), Louis Stokes Cleveland VA Medical Center, Cleveland, OH

Undergraduate Alumni & former members 

Nicholas Maricic, B.A. (2021) - University of Akron, Master's program in Clinical Mental Health Counseling

Nicholas' work in the ARC Lab focused on better understanding the role of hope and optimism in ameliorating depressive symptoms. In the past, he volunteered with Big Brothers Big Sisters of Northwest Ohio and worked with foster children and African refugee children within Cuyahoga County. Since graduation, Nicholas is furthering his education in graduate training to pursue a career as a clinical mental health counselor.

Mackenzie Cooper, B.A. (2021) - University of Toledo, Master's program in Social Work

Mackenzie joined the ARC Lab to gain experience in the laboratory setting. After graduation, she is now pursuing a career in social work to one day become a therapist. She plans to work with adolescents and adults with an emphasis on work dedicated to communities of color.

Kellyann Navarre, B.A. (2020) - Cleveland State University, Master's program in Clinical Psychology
During Kellyann's lab ensure, her primary research interests involved emotion regulation in the context of borderline personality disorder, self-injury, and suicide. Her secondary interests included disability-related issues, including treatment accessibility,  barriers to treatment, and stigma/ableism. Kellyann was involved in the execution and dissemination of studies and their data at multiple local and national conferences.

Kaylynn Frantz, B.A. (2020) - Industry employment

Kaylynn joined the ARC Lab to be more involved in the psychology community at the University of Toledo and to explore the field of psychology outside of the classroom. Her primary interest involved combining her passion for sports and helping others to one day become a sports psychologist. 

Madiana Rangel, B.A. (2020) - Clinical Practice
Madiana joined the ARC Lab to acquire research experience with mindfulness. She hopes to work as a clinical psychologist with SMI patients in state facilities. Het interests included severe mental illnesses (SMI; e.g., schizophrenia and bipolar disorder.
Kelsey Fairchild, B.A. (2020) - Clinical Practice (Psychiatric Nursing)
Prior to joining the ARC Lab, Kelsey worked for Ramapo for Children, a non-profit organization, as a program coordinator for the Staff-Assistant Experience Program. Her role included implementing daily structures for the residential transition-to-independence program designed to assist young adults with social, emotional, or learning challenges. Kelsey assisted in running participants in studies and helping with literature reviews. 
Sarah Herr, B.A. (2020) - Clinical Practice
As a long-time research assistant in the ARC Lab, Sarah was involved in the execution and dissemination of studies and their data. She has co-authored several posters which include, "Type of mindfulness meditation and emotion regulation deficits predict state mindfulness outcomes post meditation."
Rippa Sehgal (2019) - University of Toledo, Ph.D. program in Biochemistry
Rippa's interests included learning more about the research processes and experimentation. Her contributions to the ARC Lab included recruitment of community participants, conducting thorough literature reviews, and developing databases to organize such literature. 
Ethan Radatz, M.A. (2019) - Clinical Practice
Ethan's interests included emotional regulation and the development of effective coping strategies. His other research interests include humor, prejudice, aggression, and nonviolence. He co-authored several research posters, including is lead-author poster titled "Mindfulness as a mediator to influence social support in students with social anxiety (Radatz, Pritchard, & Mezo, 2019)." 
Rana Al-Nahhas (2019)Howard University, Masters program in Occupational Therapy
At the ARC Lab, Rana's interests were in the effects of avocational interests and physical activity in the regulation of anxiety and depressive disorders. Her contributions include her recruitment of community participants, conducting thorough literature reviews, and developing databases to organize such literature. Outside of the lab, she utilized her skills in Applied Behavior Analysis.
Taylor Shook (2019) - University of Toledo Medical School, M.D. program
As another long-time undergraduate of the ARC Lab, Taylor was involved in several aspects of building research studies and training in physiological measurement and data processing. She co-authored several research posters, in addition to her lead-author poster titled "Self-regulation in emotional affect and self-esteem (Shook et at., 2017)."
Hannah Marshal (2018) - Kent State University, Ph.D. program in Cognitive Psychology
Hannah served as one of the initial long-time members of the ARC Lab, contributing to the lab through literature reviews, creating study materials, piloting studies, and training in physiological measurement. She assisted in producing several research posters, with her most important contribution being her poster titled "Social support mediates the effects of mindfulness on depression (Marshal et al., 2018)," which was awarded as the top poster presentation at the UT Department of Psychology first annual Research Showcase.
Raghad Hassabelnaby (2018) -  William Paterson University , Psy.D. program in Clinical Psychology
Raghad contributed to the ARC Lab through her initial recruitment of study participants, reviewing critical literature, and assisting in creating study materials. She also co-authored the research poster "Evaluating the validity of the Self-Control and Self-Management Scale in a midwestern student sample (Herc et al., 2018)."
Ben Harrison - Industry Employment
Ben joined the ARC Lab to explore the relationship between emotions, abnormal behaviors, and personality. His contributions to the lab include recruiting student and community participants, processing psychophysiological data, and disseminating findings from the ARC Lab's studies. This includes his initial poster titled "Perceived social support mediates mindfulness and positive affect (Harrison et al., 2019)."
Kajuan Willis - Industry Employment
Kajuan's time in the ARC Lab was guided by her passion to improve the lives of others. Her contributions include creating test materials, reviewing literature, and piloting studies.
Anna Wagenhauser - Industry Employment
Anna's primary research interests in the ARC Lab involved the intersections between psychology and economics. During her time in the ARC Lab, she assisted with the collection and review of research literature, developed materials for use during studies, and presented her own research poster entitled "Understanding promotion versus prevention focused behavior and related self-regulatory processes (Wagenhauser et al., 2017)."
Kaylee Finch - Industry Employment
Kaylee's research interest during her time with the ARC Lab included her focus on depression and emotion regulation, In particular, she contributed to the ARC Lab's initial research poster and she independently completed a review project titled "Emotion Regulation and Depression: An Annotated Bibliography."
Dani Bolovan (2015) - Industry Employment

Dani engaged in several tasks during the foundation of the ARC Lab at UT, including assisting with creating the ARC Lab's initial research presentation entitled "The intersection of self-management with emotion regulation and mindfulness (Mezo et al., 2016)."

Last Updated: 12/10/21