Approach/Avoidance Motivation, Message Framing, and Health Behavior: Understanding the Congruency Effect
Motivation and Emotion (2006) - Comment
pubmed: 19079797  doi: 10.1007/s11031-006-9001-5  issn: 0146-7239  issn: 1573-6644 

David K. Sherman, Traci Mann, John A. Updegraff