Psychodynamic therapy actually worsens depression

Antonuccio, David O. & Danton, William G. (1995). Psychotherapy Versus Medication for Depression: Challenging the Conventional Wisdom With Data. Professional Psychology: Research and Practice, Vol. 26, No. 6, 574–585.

Doing math cures depression

Scult, Matthew, Knodt, Annchen, Swartz, Johnna, Brigidi, Bartholomew & Hariri, Ahmad (2016). Thinking and Feeling: Individual Differences in Habitual Emotion Regulation and Stress-Related Mood Are Associated With Prefrontal Executive Control. Clinical Psychological Science.

Concrete abreaction helps

Watkins, Edward R., Baeyens, C. B. & Read, R. (2009). Concreteness training reduces dysphoria: proof-of-principle for repeated cognitive bias modification in depression. Journal of Abnormal Psychology, Vol 118(1), 55-64.