Lay summary
Prevalence of mood disorders in NZ is highest for younger age groups and our rates of suicide are amongst the worst in the OECD. Depression in young adulthood is an important remediable risk factor for suicide. A key factor relating to onset and persistence of depression is 'rumination', a thinking style involving excessive and repetitive focus on mood symptoms. This project will involve development of an innovative online Cognitive Control Training (CCT) intervention which targets rumination. The CCT intervention will be designed with strong input from lived experience and Māori partners, and in collaboration with researchers with international expertise in digital interventions. Following development, we will assess preliminary feasibility and acceptability of the intervention in a small number of participants, which will guide future, larger clinical trials.