study 1
- title：Positive Affect Stimulation and Sustainment (PASS) Module for Depressed Mood: A preliminary investigation of treatmentrelated effects
- authors：Dana L. McMakina, Greg J. Siegleb, and Stephen R. Shirkc
study 2
- title：Imagining a brighter future: The effect of positive imagery training on mood, prospective mental imagery and emotional bias in older adults
- authors：Susannah E. Murphy a,n, M. Clare O’Donoghue a, Erin H.S. Drazich a, Simon E. Blackwell b, Anna Christina Nobre a, Emily A. Holmes b, *