Integrating theory-based and data-driven methods to case conceptualization: A functional analysis approach with ecological momentary assessment.

Ecological momentary assessment (EMA) and network analysis are promising empirical developments for psychotherapy research and practice, but they lack a therapeutic rationale that could guide case conceptualization and treatment planning. We developed an assessment strategy that aims to assess functional analysis with EMA. The assessment strategy was applied to a series of three N-of-1 assessments in a proof-of-concept study. After selecting a personalized set of items, EMA was implemented with three measurement time points per day for a period of 30 days. The participants evaluated feasibility and acceptance. Practicing psychotherapists discussed clinical implications in a focus group. The implementation of the assessment strategy seemed feasible and accepted; participants did not report any side effects. Principal component and network analyses indicated interpretable components (e.g., participant 1: hopelessness, procrastination, coping, avoidance). The focus group pointed out potentials (e.g., efficient profit of the waiting time, empowering patients) and challenges (e.g., prioritize and interpret all the information). The presented assessment strategy may enhance the scientific quality of case conceptualization empowering therapists' decision-making regarding treatment planning. At the same time, it is a concrete demonstration of the challenges that need to be addressed in future research.