Holli Seitz, MPH, PhD

Holli Seitz, MPH, PhD, is the director of the Message Lab. An expert in message effects, she is most interested in applying communication science to advance health and to understand how best to communicate science. Dr. Seitz is an associate professor in the Department of Communication at Mississippi State University and a Research Fellow at the Social Science Research Center. She can be reached at

Rachel Adair

Rachel Adair is an undergraduate research assistant in the Message Laboratory.  Rachel is a Provost Scholar double majoring in Marketing and Economics. Rachel’s research interests include public health communication and social media marketing. She is currently assisting in the evaluation of the HappyHealthy social marketing campaign.

Avery Tate

Avery Tate is an undergraduate research assistant in the Message Laboratory. Avery is majoring in Psychology with minors in Communication and Media Studies, Business Administration, and Cognitive Science. Her research interests lie at the intersection of psychology and communication, and she is contributing to the Extension Collaborative on Immunization Teaching and Engagement (EXCITE) project.