[Therapy Process Questionnaire (TPQ) - a combined explorative and confirmatory factor analysis and psychometric properties].

OBJECTIVES This contribution looks at the factorial structure of the Therapy Process Questionnaire (TPQ), which is used for daily self-ratings of patients tested by internet-based ambulatory assessment devices. METHODS A combined explorative and confirmatory factor analysis of the TPQ. The time-series data were generated by 149 patients treated in an inpatient setting. RESULTS 23 out of 42 items included in the explorative version of the TPQ are represented onto five factors, which were identified by a first explorative factor analysis and then validated by a confirmative factor analysis. We report on the psychometric data of the subscales: internal consistency (Cronbach's α), mean of item-intercorrelation, and mean of item discrimination indices. CONCLUSION The TPQ is useful for a high-frequency and equidistant (daily) assessment of psychotherapeutic change processes.

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