After translating the Nijmegen Professional Scale into German, we conducted its cultural adaptation, the German Professionalism Scale (Pro-D). Its psychometric properties were assessed using Cronbach's α, descriptive statistics, and test-retest reliability. The validation of the construct was analysed by confirmatory factor analysis. Feasibility was confirmed in interviews with GP trainees and their trainers.
A total of 133 trainees completed the Pro-D. The Pro-D showed high internal consistency (Cronbach's α 0.93) and good test-retest reliability (Spearman's rank correlation and Wilcoxon's matched-pairs test) for the different domains. Confirmatory factor analysis was unable to establish construct validity. Change in sensitivity of the instrument was good. Statements of interviews confirmed the feasibility of the new instrument.
We found good psychometric properties for the Pro-D. This might indicate transferability of the concept across linguistic, cultural and societal differences although the concept of professionalism was not replicated in a confirmatory factor analysis.
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