Table 1.

Group sessions and computer and multimedia elements of the intervention.

Week	Web-based module	Group session	App	Workbook
1	Introduction into mindfulness	Introduction into ACTa, mindfulness	Feature 1: Mindfulness in daily life	List of mindful activities
2	Natural suffering and suffering through avoidance	Avoidance and acceptance	Feature 2: Acceptance	Acceptance of a difficult situation, topic, character trait, or conflict; Reflection on mindfulness
3	Defusion	Fusion and defusion	Feature 3: Defusion	Typical examples of defusion
4	Values, goals, and self-management	Values, mastery, and self-management	Feature 4: Mastery activities	Bull’s-eye exercise; Example and sheet for SMARTb principle; Activity planning
5	Commitment	Commitment and positive reinforcement	Feature 5a: “Do activities” Feature 5b: “Do not activities”	Determination, ranking, and planning of do- and do not activities; Self-management; Activity planning
6	Expansion of behavioral activation	Expansion of behavioral activation	Continuation of previous features of the app	Contracts
7	Review and transfer	Transfer and conclusion	Continuation of previous features of the app	Plan for relapse

^aACT: Acceptance and Commitment Therapy.

^bSMART: frequent self-management principle.