The following process measures are examined: (a) Post-session reports (Flückiger et al., 2010), working alliance (Munder et al., 2009) and symptom change (BAI) are conducted from session 1 to 15 and (b) In-session processes: Using the recorded videotapes, adherence ratings (Zinbarg et al., 2007), the Resource-Oriented Microprocess Analysis (ROMA-P/T, Flückiger & Grosse Holtforth, 2008) and the level of explication scale (Sachse, 1992) are conducted at session 2, 5 and 8.