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.


Research Staff

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.



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. 




Nabeel Hamzeh, MD

Dr. Nabeel Hamzeh is an Associate Professor in Pulmonary, Critical Care and Occupational Medicine.  He directs the University of Iowa’s Interstitial Lung Disease program and is actively working to expand the scope of the institution’s clinical efforts and sarcoidosis research. Through a collaborative effort among Drs. Nabeel Hamzeh, Alicia Gerke, Karin Hoth, and Knute Carter the University of Iowa was selected to join the Foundation for Sarcoidosis Research Clinical Studies Network in 2018. Drs. Hamzeh and Hoth are currently conducting a project to better understand cognitive difficulties among individuals with sarcoidosis.  Click here to learn more about Dr. Hamzeh.

Diana Jalal, MD

Dr. Diana Jalal is a nephrologist who is a Clinical Associate Professor of Internal Medicine at the University of Iowa and the Deputy Chief of Subspecialty Medicine at the Iowa City VAMC. She currently leads a 4-year NIH funded grant to study curcumin supplementation for improving vascular and cognitive function in chronic kidney disease (CKD). Dr. Hoth is a co-investigator on the project overseeing the cognitive assessment component of the project.  Click here to learn more about Dr. Jalal.

Chooza Moon, PhD

Dr. Moon is an Assistant Professor in the College of Nursing. Her research broadly focuses on how sleep and life style risk factors contribute to brain health. Her current research examines how sleep and activity patterns affect the brain in patients with cardiovascular disease. Dr. Hoth is a collaborator and mentor on Dr. Moon’s “Sleep Heart Aging Study,” which is funded by pilot project grants awarded to Dr. Moon by the University of Iowa College Of Nursing and the University of Iowa Center on Aging and the Mind and Brain Initiative. Click here to read more about Dr. Moon.

Anand S. Iyer, MD

Dr. Iyer is an Assistant Professor at the University of Alabama at Birmingham in Birmingham, AL. His clinical research focuses on patient centered outcomes research (PCOR) in COPD, specifically understanding the burden of psychological symptoms and developing novel interventions to improve quality of life in COPD. He is currently developing a palliative and supportive care intervention for COPD patients and their family caregivers with support from an institutional PCOR K12 award on which Dr. Hoth is a co-mentor. Dr. Hoth and Dr. Iyer also collaborate on research exploring the burden of anxiety and depressive symptoms and their impact on COPD-related outcomes in conjunction with members of the CODPGene study Social and Behavioral Sciences subgroup. Click here to read more about Dr. Iyer.


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