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Background: Using mobile communication technology as new personalized approach to treat mental disorders or to more generally improve quality of life is highly promising. Knowledge about intervention components that target key psychopathological processes in terms of transdiagnostic psychotherapy approaches is urgently needed. We explored the use of smartphone-based micro-interventions based on psychotherapeutic techniques, guided by short video-clips, to elicit mood changes.Method: As part of a larger neurofeedback study, all subjects – after being randomly assigned to an experimental or control neurofeedback condition – underwent daily smartphone-based micro-interventions for 13 consecutive days. They were free to choose out of provided techniques, including viscerosensory attention, emotional imagery, facial expression, and contemplative repetition. Changes in mood were assessed in real world using the Multidimensional Mood State Questionnaire (scales: good–bad, GB; awake–tired, AT; and calm–nervous, CN). Results: Twenty-seven men participated on at least eleven days and were thus included in the analyses. Altogether, they underwent 335, generally well-tolerated, micro-intervention sessions, with viscerosensory attention (178 sessions, 53.13%) and contemplative repetition (68 sessions, 20.30%) being the most frequently applied techniques. Mixed models indicated that subjects showed better mood (GB: b=0.464, 95%confidence interval (CI) [0.068, 0.860], t(613.3)=2.298, p=0.022) and became more awake (AT: b=0.514, 95%CI [0.103, 0.925], t(612.4)=2.456, p=0.014) and calmer (CN: b=0.685, 95%CI [0.360, 1.010], t(612.3)=4.137, p |
