Principal Investigator

Karin Hoth, PhD, ABPP, Associate Professor

Department of Psychiatry, University of Iowa


Dr. Hoth is a board certified clinical neuropsychologist with expertise in aging and cognitive changes associated with chronic medical illnesses.  She received her Ph.D. in Clinical Psychology from the University of Iowa and completed both her pre-doctoral internship and a two-year fellowship in Clinical Neuropsychology at Brown University.  Her research focuses on two major themes: 1) identifying physiological mechanisms that impact the brain in adults with chronic cardiopulmonary diseases, and 2) psychological adjustment, particularly anxiety and depression, in chronic lung disease. She has received research awards including a Ruth L. Kirschstein National Research Service Award (F32), a Clinical-Translational Research Scholar Award (KL2), a Patient-Oriented Career Development Award (K23), and a NIH Research Project Grant (R01).  She has an interest in education, specifically related to professional career development.


Lab Members

Hannatu Amaza, BS, CCRC

Department of Psychiatry, University of Iowa


Hannatu Amaza is a full-time Research Associate in the Hoth Lab involved in all aspects of study management. She has a Bachelor of Science Degree in Biology and is a member of the Association of Clinical Research Professionals, where she holds her clinical research coordinator certification (CCRC).  Prior to joining the lab she worked in Wisconsin coordinating clinical research projects in a range of areas of medicine including cardiology and neurology.

Cari Linkenmeyer, MAE


Department of Psychiatry, University of Iowa


Phone:  319-353-8520




Carinda (Cari) Linkenmeyer is a Research Associate for the Hoth Lab. Cari graduated from Iowa State University in Ames with a bachelor’s degree in psychology. She went on to earn a master’s degree in education (school counseling) from the University of Northern Iowa in 2010. Cari worked as a substitute teacher and school counselor before joining the University of Iowa Neuroimaging Consortium in the Department of Psychiatry as a research assistant in January 2013.  She has assisted with research focused on adolescent brain development, Huntington’s disease, and now the COPD and the Brain study.



Allison Mask, MS

Allison Mask is a part-time Research Assistant working on the COPD and the Brain collaboration project with Dr. Gary Pierce. Allison graduated from Luther College in Decorah, IA with a Bachelor of Arts degree in Biology and Chemistry in May 2017. Prior to joining the lab, Allison completed her M.S. degree in Biomedical Sciences from Des Moines University. Allison will be working to analyze the vascular data for the COPD and the Brain study. 

Undergraduate Students


 Holly Hemann

Holly Hemann is a student in pursuit of a BS in biomedical sciences with minors in psychology and chemistry at the University of Iowa. She is an undergraduate research assistant working on the COPD and the Brain study.

Graduate Students

Anna Croghan, MA, Clinical Psychology Graduate Student

Department of Psychology, University of North Dakota

Anna Croghan is a Ph.D. candidate at the University of North Dakota studying clinical psychology. Anna's research interests broadly include the interaction between mood disorders and neuropsychological functioning in individuals with chronic illnesses. Prior to beginning her graduate school program in 2016 she was a research assistant in the Hoth lab.  She completed a graduate student summer fellowship at the University of Iowa in 2017 and maintains involvement with the COPD and the Brain study.

Rachel Luehrs, MS


Rachel Luehrs is a Ph.D. student in the Health and Human Physiology Department. She works in the Iowa Translational Vascular Physiology lab under the mentorship of collaborator Dr. Gary Pierce. Rachel is currently a graduate research assistant on the COPD and the Brain study. Rachel received her M.S. degree in Clinical Exercise Physiology at East Stroudsburg University of Pennsylvania. Prior to her Master's degree she received her B.S. in Exercise Science from St. Ambrose University. Her research focuses on identifying the mechanisms underlying central arterial stiffness in individuals with COPD. 



Click here to learn about the COPD and the Brain Study Co-Investigators


Former Lab Members

Andrew Metzger, MABE, Clinical Trials Research Assistant/ Data Manager

Christina Wong, Undergraduate Research Assistant

Ellen Kinner, MA, Clinical Science Graduate Student-Behavioral- Biomedical Interface Training Program Rotation Student, Department of Psychological and Brain Sciences

Amanda Brunette, MA, Clinical Science Graduate Student- Behavioral-Biomedical Interface Training Program Rotation Student, Department of Psychological and Brain Sciences

Chloe Hlas, BA, University of Iowa MD candidate- Summer Research Fellowship Program

Benjamin Reasoner, MS, University of Iowa MD candidate-Summer Research Fellowship Program