Single Session Intervention for Postpartum Intrusive Thoughts

This proposal aims to adapt and refine two evidence-based interventions into a scalable, personalized, digital intervention targeting the misinterpretation of intrusive thoughts during the postpartum period. The intervention will be piloted for its effectiveness, and its implementation outcomes will be examined by recruiting new parents (N = 30) in an open trial, aiming for a target of N = 24, accounting for attrition. This study will recruit across the U.S. from the leading digital resource for new and expectant parents with a nationally representative user population, and will facilitate its reach to people with distressing intrusive thoughts regardless of where they live - rural, suburban, or urban areas. Outcomes to be evaluated include: target engagement (interpretation bias), changes in our primary outcome (intrusive thoughts severity), and feasibility and acceptability (see Measures).

In this pilot trial, our central hypothesis is the intervention will be feasible, acceptable, and meet a priori benchmarks for preliminary effectiveness in reducing interpretation bias and improving outcomes for clinical levels of postpartum intrusive thoughts, parent anxiety, and psychosocial functioning. Testing effectiveness and implementation will inform strategies to refine and integrate low-burden digital interventions for new parents into real-world service delivery, supporting a fully-powered hybrid type 1 trial and enabling dissemination of a brief, accessible, low-cost intervention to reduce the perinatal intrusive thoughts and improve public health for new parents.