Table 2 An overview of group session content

(1) Introduction to session structure and homework assignments, discussion of relapses, emergency measures and introducing analysis of gambling behavior (AGB)

(2) AGB, brief mindfulness exercise (BME), values clarification, steps in valued direction and reflecting upon consequences of gambling

(3) AGB, BME, identification of emotions and their function in gambling and psychoeducation about gambling

(4) AGB, BME, acceptance and problem-solving skills

(5) AGB, BME and managing difficult emotions

(6) AGB, BME and gambling cognitions

(7) AGB, BME and using defusion techniques with gambling cognitions

(8) Continuing progress, identification of obstacles discussing values and steps in valued direction, repeating components and discussing prevention of relapses

(9) Booster session, 3 months after session 8: content review, relapse prevention, problem solving and AGB