Purpose/Objectives: To explore whether repetitive negative thinking (RNT) mediates the pathway between subscales of caregiver burden and depressive symptoms. Design: Cross-sectional pilot study. Setting: Bone marrow unit at the University of Louisville Hospital in Kentucky and caregiver support organizations in Louisville. Sample: 49 current cancer caregivers who were primarily spouses or partners of individuals with lymphoma or leukemia and provided care for a median of 30 hours each week for 12 months.