“…In‐session emotional arousal and processing may be a key mechanism of change across therapy models and disorders (Greenberg & Pascual‐leone, ; Solbakken, Hansen, & Monsen, ; Whelton, ). For example, a number of process‐outcome studies have indicated that the degree of in‐session emotional activation is related to outcome in psychodynamic therapies (e.g., Diener, Hilsenroth, & Weinberger, ; Fisher, Atzil‐slonim, Bar‐Kalifa, Rafaeli, & Peri, ; Town, Lomax, Abbass, & Hardy, ; Town, Salvadori, Falkenstrom, Bradley, & Hardy, in press), as well as in emotion‐focused therapy (Goldman, Greenberg, & Pos, ; Pos, Greenberg, Goldman, & Korman, ). Previous research on ISTDP has also indicated that a high degree of MUCE in treatment (i.e., an “unlocking of the unconscious”) is associated with better outcome in mixed patient samples (Johansson, Town, & Abbass, ; Town, Abbass, & Bernier, ).…”