Testing the differential impact of an internet-based mental health intervention on outcomes of wellbeing and psychological distress during COVID-19 (Preprint)
BACKGROUND During COVID-19, the mental health of the general population has been precarious, making it pivotal to determine the impact of complementary internet-based psychological interventions on psychological distress and mental wellbeing. Both types of outcomes represent distinct dimensions of our mental health and congruent changes in outcomes of distress and wellbeing do not necessarily co-occur within individuals. When testing intervention impact it therefore is important to assess change on both outcomes on the individual-level, rather than solely testing group differences in average scores on the group-level. OBJECTIVE The current study set out to investigate the differential impact of an internet-based group mental health intervention on outcomes of wellbeing (i.e., wellbeing, life satisfaction, resilience) and indicators of psychological distress (i.e., depression, anxiety and stress). METHODS A 5-week mental health intervention was delivered to 90 participants using the Zoom platform. Impact on outcomes of distress, wellbeing and resilience was assessed at the start and the end of the program, with MANOVA and Reliable Change Indices (RCI) being used to determine program impact on the group and the individual level respectively. RESULTS The intervention significantly improved all mental health outcomes measured, showing small to moderate effects sizes. Larger effect sizes could be noted for those with problematic mental health scores at baseline. A total of 92% of participants demonstrated reliable change in at least one mental health outcome. Differential response patterns using RCI revealed that more than half of the participants showed improvement in both mental wellbeing and psychological distress, almost one third in outcomes of wellbeing only, and almost a quarter in distress only. CONCLUSIONS Results provide evidence for the significant impact of an internet-based mental health intervention during COVID-19 and indicates the importance of assessing dimensions of wellbeing and distress when determining intervention effectiveness. CLINICALTRIAL Not applicable