To Örebro University

Introduction: Time management skills are crucial in daily life—at home, to maintain employment, and in parenting—posing a challenge for people with impaired executive functioning. To improve time management skills, individual occupational therapy is commonly offered. The occupational therapy group intervention Let’s Get Organized (LGO) includes ten weekly sessions with a focus on time management skills; it has shown promising results but needs to be further evaluated. Aim: The overall aim of this thesis was to evaluate the time management group intervention LGO for people with ADHD, autism, or mental disorders regarding effectiveness, sustainability over time, and parenting perspectives. Method: LGO was evaluated in four studies with different designs: a multi-center, two-armed, randomized controlled trial including 75 participants who were randomized to LGO or individual occupational therapy (Study I); a single-group one-year follow-up study including 38 participants (Study II); a study including data from the participants in Study I who were parents (n = 28, Study III); and a qualitative interview study with parents after intervention (n = 15, Study IV). To analyze the data, non-parametric tests, a mixed-effects model, correlation testing, and inductive qualitative content analysis were used. Results: Time management skills improved in both groups (LGO and individual occupational therapy) with no difference between them (Study I). Additionally, organization and planning skills and emotional regulation improved after intervention in both groups (Study I). The improved time management skills achieved after LGO were sustained one year after intervention (Study II). Parents improved significantly in parental self-efficacy after time management interventions with no difference betweenthe type of intervention (Study III). Parents experienced more active parenting and better predictability in the whole family after participating in LGO (Study IV). Conclusion: Time management interventions improve time management skills; the improvement is sustained over the long term and moreover has a positive impact on parenting.