Maddison's research interests are around weight stigma and weight-based discrimination experienced in provider-patient interactions among clinically obese individuals. She is interested in which specific experiences contribute to weight-bias internalization and psychological distress, and how these contribute to maladaptive eating behaviors, such as emotional or binge eating. She is also interested in the impact of weight stigma on eating behaviors and weight perceptions within different spheres of influence, including healthcare and interpersonal relationships. Long-term interests include intervention development to reduce experienced weight stigma in provider-patient interactions and evaluation of best clinical practices for promoting reduced weight-based psychological distress and healthy eating behaviors. In addition, she wants her work to address how dietetic students are trained in ways that better address weight bias.