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The BioS.P.H.E.R.Es Lab

Biomarkers for social, psychological health, & education retention explorers!

Our research lab examines emotion regulation, social, and motivational factors that predict student well-being, including their quality of life, acculturative stress, and physiological stress (via survey questionnaires and salivary biomarkers). Currently, we are interested in developing interventional programs to sustain pipelines toward higher ed completion, particularly for students from diverse backgrounds. In previous iterations of the lab, we have collected pilot data, and we have launched our first study housed at UA in Spring 2022!

Katherine C Cheng, PhD, Assistant Professor, Department of Educational Psychology

Dr. Katherine C. Cheng (also known as Kat) graduated with her PhD in Family and Human Development from Arizona State University, with a specialization in Measurement and Statistical Analysis, and also holds a Master’s degree in Psychology from New York University with Developmental and Social Psychology concentrations. Kat completed her two-year postdoc fellowship at the University of Nebraska-Lincoln, in the Center for Research on Children, Youth, Families and Schools. Before joining the UA, Kat spent one year as an Assistant Professor in Human Development at California State University San Marcos. Her research and teaching interests involve children, youth, and young adult well-being, particularly relating their emotional and motivational development, and stress regulation (manifested in self-reported surveys and biomarkers such as salivary cortisol) in high-risk family and school contexts. Kat often uses advanced quantitative methods (e.g., structural equation modeling) in her research investigations. She is also a yogi and dog lover and enjoys hiking/swimming and playing with her toddler in her leisure time.

 

 

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Thrinath Nayak Dharavath

Thrinath Dharavath is a Ph.D. student in Educational Psychology at the University of Arizona. His research interests focus on students’ sense of belonging, emotion regulation, stress, and well-being in higher education settings, particularly among underserved and diverse student populations. He is especially interested in interdisciplinary research that connects psychological experiences with biological and physiological processes, including stress biomarkers such as diurnal cortisol. He holds master’s degrees in Health Psychology from the University of Hyderabad and Organizational Psychology from the University of Strathclyde. Outside of research and teaching, Thrinath enjoys music and stargazing.

 

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Thrinath Nayak Dharavath portrait

 

Nathan Gallegos

Hi, my name is Nathan Gallegos. I am a PhD student in the educational psychology program at the University of Arizona. I transferred from the Psychology department where I would have been a 5th-year graduate student. My research experience has included a wide range of topics including preclinical Alzheimer's disease, time perception, down-syndrome in children, eye-witness testimony, and culture. I am currently interested in understanding how Hispanic culture can influence various aspects of one's life, with a particular interest in college students. I'm currently working on understanding how cultural differences may be contributing to time perception and how those effects may be related to academic performance in Hispanic students. I am also interested in the Hispanic Health Disparities Paradox which is a phenomenon where Hispanic individuals have many more adverse health risk factors but they have better health outcomes compared to other racial and ethnic groups such as Whites.

 

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nathan gallegos headshot

 

Isabella Palazuelos

Isabella Palazuelos is currently a doctoral student in the Educational Psychology department at the University of Arizona and a TA for EDP 403: Adolescent Development. Her research interests revolve around uplifting and affirming practices in public schools, specifically those that positively impact Mexican American students. Her work is inspired and motivated by her experiences as a Mexican American student growing up in Oxnard, California. She received a B.S. in Psychology and a B.A. in Latin American Studies with a minor in Philosophy from the University of Texas at Dallas. She is excited to bring these experiences to the amazing work of the BioSPHEREs lab. Outside of school, Isabella is a swim instructor who loves reading and going to the movies.

 

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Isabella Palazuelos

 

 

Margaret Medina, Ph.D.
Bryanna Smith, BA

 

Laura Bates

New faculty of the Holyoke Community College, MA

 

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laura bates headshot

 

Adriana Kendrick-Perez

Adriana is currently a postbaccalaureate student in Psychology at the University of Arizona. Their research interests include: emotional regulation, motivation, identity development, discrimination, personality & health and neurodiversity. They are excited to be a member of the BioSPHEREs lab and have the opportunity to explore a new area of psychology. In their free time, they enjoy gaming and writing poetry.

 

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adrianna kendrick-perez headshot

 

Katrina Jean, MA Lecturer, Sonoran Center for Excellence in Disabilities, Family and Community Medicine, THE UNIVERSITY OF ARIZONA

Katrina Jean was a Ph.D. student in the Educational Psychology program at the University of Arizona. Her research focuses on school-based mental health care and promoting equitable access to care. She is also interested in improving policy for students in K-12 education, with a particular focus on students with mental health needs and neurodevelopmental disabilities. Katrina is seeking connections between the research done in the BioSPHEREs lab and ways that measures of stress can support mental wellness research in education. She received her BFA in Art Education from Arizona State University and her MA in Art Education from California State University, Long Beach. After teaching for 10 years in K-12 education, she decided to pursue her Ph.D. to research improvements that can aid in creating a better education system.

 

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katrina fengler headshot

Megan Hokama, Tenure-track Psychology Instructor at University of Hawai'i: Hawaiʻi Community College - Pālamanui Campus

Megan Hokama was a Ph.D. student in Educational Psychology at the University of Arizona, and is a TA for ACBS160. Her research interests stem in expanding future research sample populations in the improvement of representation in an increasingly diverse society and to determine cognitive and motivational patterns in adolescent populations relating to intercultural and collaboration influences. She is excited to be a part of BioSPHEREs lab and explore an interdisciplinary approach to educational psychology research. Megan also received a B.A. in Psychology and minor in Art History at Loyola Marymount University and her M.A. in Psychology at Pepperdine University. Originally from Torrance, California, Megan enjoys ceramic wheel throwing during her downtime.

 

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Megan Hokama headshot

 

Yamini Sumalatha Bhukya, Public Health Infrastructure Grant (PHIG) Evaluator & Strategic Analytics Lead for the Pima County Health Department

Hi, my name is Yamini Sumalatha Bhukya, and I was a PhD student in the Educational Psychology Department, as well as a TA for EDP 200. I hold an undergraduate degree in Psychology with a minor in Sociology, and a master’s degree in Health Psychology from India. My research experience includes working on burnout, job satisfaction, psychological well-being, working health care professionals, parenting styles, and traditional medicine. I have also had the opportunity to work as a junior Hospice psychologist in India. Currently, my research interests focus on language and motor development, and a deep passion for exploring tribal education, policy, and literacy. I am thrilled to join the BioSPHEREs Lab and utilize biomarkers to gain deeper insights into educational psychology. Outside of academics, I am a devoted dog lover and enjoy swimming.

 

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Yamini Sumalatha Bhukya wearing a yellow sweatshirt, holding a jacket, standing outside in a desert lanscape

 

Cheng, K. C., Hokama, M. M., Gallegos, N. J. (2026). Future-oriented motivation and emotion regulation jointly decreased acculturative stress in university students with multiple marginalized identities. Hispanic Journal of Behavioral Sciences. Advance online publication, 1–27. https://doi.org/10.1177/07399863261437232<https://doi.org/10.1177/07399863261437232


Bhukya, Y., Cheng, K. C., Perfect, M., & Gallegos, N. (2025, August). Sleep hours and emotional regulation difficulties in university students: Associations over a semester. Presented as poster for the 2025 Annual American Psychological Association Meeting (Division 38 Health Psychology), Denver, CO.

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Bhukya

 


Cheng, K. C., Boise, C. E., Sheridan, S. M., Moen, A. L., Knoche, L., & Friesen, R. S. (2025). Predicting preschool learning behaviors with classroom quality for children with developmental risk. Educational Psychology. http://dx.doi.org/10.1080/01443410.2025.2481161 


Cheng, K. C., & Smith, B. D. (2021, April). Future-oriented motivation and emotion regulation jointly predicting end-of-semester acculturative stress in students with cumulative disadvantage. Poster presented at the American Education Research Association 2021 Virtual Annual Meeting (Division C). aera21-aera.ipostersessions.com/Default.aspx?s=6B-4F-44-FC-8C-5F-4B-5A-67-CC-61-6D-3F-0B-0D-8D


Poster QRcode

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Biosphere Lab QR code

Fengler, K., Cheng, K. C., Scherr, J. (2022, August). The associations between cognitive reappraisal and perceived quality of life. Accepted for Division 15 presentation at the 2022 Annual American Psychological Association Meeting, Minneapolis, MN.

See our poster presented at APA 2022 meeting below:

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biosphere lab poster pic

Graham, M. C., Cheng, K. C., Husman, J., Hokama, M., Jean, K., Kendrick-Perez, A. E., Bates, L. Examining stress and emotions in university students as they explore or experience racism: Methods and theory. Presented as an interactive paper session at the 2023 biennial Southwest Consortium for Innovative Psychology in Education, Portland, OR.

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bio lab group photo
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bio lab group in front of class

Graham, M. C., Cheng, K. C., *Kendrick-Perez, A. K. P., *Bates, L., Husman, J., *Jacobson, K., *White, D., *Sullivan, B., & *Smith, M. (2024, August). Examining pre-service teachers’ physiological response to implicit bias tests. Poster presented at the 2024 Annual American Psychological Association Meeting (Division 15 Ed Psych), Seattle, WA. 

Poster presented at APA 2024 meeting:

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selfie in front of poster presentation at APA 2024 meeting

BioSPHEREs Lab PhD Student Meets the President of India

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BioSPHEREs Lab PhD Student Meets the President of India

BioSPHEREs lab PhD student Thrinath Nayak Dharavath was invited for a special in-person interactive meeting with the Honorable President of India, Droupadi Murmu, the first person from an indigenous tribal community to hold this office, at the Presidential Palace (Rashtrapati Bhavan) in New Delhi on June 2, 2026. He was shortlisted by the Ministry of Tribal Affairs, Government of India, based on his outstanding academic record and career progress, as a recipient of the National Overseas Scholarship 2023, a prestigious Government of India scholarship awarded to meritorious Scheduled Tribe (indigenous community) students for master's education abroad. Thrinath completed his Master's in the United Kingdom under this scholarship before joining the PhD program and BioSPHEREs lab at the University of Arizona. This meeting is an immense honor and holds deep personal and professional meaning. President Murmu is the first Head of State in India from an indigenous tribal background, making this interaction a proud moment.


The Graduation of Katrina Jean, PhD in Dec 2025

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The Graduation of Katrina Jean, PhD in Dec 2025


End-of-Spring lab pizza party, 2026

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 End-of-Spring lab pizza party, 2026


Hooding of Megan Hokama, PhD in May 2026

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Megan at the 2026 College of Education Graduation being hooded for her PhD


The Graduation of Megan Hokama, PhD in May 2026

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 The Graduation of Megan Hokama, PhD in May 2026

The Graduation of Laura Bates, MA in May 2025

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Laura Graduating
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Laura Graduating

Spring break BioSPHEREs lab happy hour 🍀

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A group of eight people gathers around a dining table in a warmly lit home, smiling at the camera. The table is set with plates, drinks, and snacks, and the background features a kitchen with wooden cabinets. The atmosphere suggests a casual and friendly gathering.

Dr. Cheng with her lab team - Spring 2025