Modification of Goal-directed and Habitual Behavior in Addiction

Each subject will receive standard SCP as group treatment once a week (1 hour) over six weeks. This group therapy is based on behavioural therapy and a psycho-educational approach (for more details see Batra \& Buchkremer 2004), and will be carried out by a qualified therapist.

Cognitive remediation treatment (CRT) employing a chess-based battery of tasks two times per week over six weeks as a group treatment in our outpatient clinic (60 min duration per session).

Implicit computer-based habit-modifying training (ICHT), applied twice a week for six weeks. In this training, the participants perform a two-part training. First, a subliminal presentation (20 ms) of negative valenced primes before smoking-cues in context and secondly, a subliminal presentation of positive valenced primes before potentially reinforcing events.