The effects of rumination, distraction, and gratitude on positive and negative affect.

In a series of classic quasi-experiments, Lyubomirsky, Nolen-Hoeksema, and colleagues demonstrated the negative effects of rumination (vs. distraction) among people with depression. Across five studies, we attempted to replicate the former studies, as well as extend them by adding a third condition, gratitude, and the measurement of positive affect.