Police professional identity can be regarded as a systematic construct
containing Professional Value (intrinsic value and extrinsic value) identity, Professional
Affection identity and Professional Environment (internal environment and external
environment) identity. Taking this as the theoretical framework, the initial Scale of
Police Professional Identity is constructed by using literature research, peer expert
consultation, on-the-job police interviews and other item analysis methods. 100 on-
the-job police officers were randomly selected for pre-test. By reliability analysis,
further item analysis and exploratory factor analysis, refine the elements and remove
invalid items, get the formal scale including 26 items with 3 dimensions of 5 elements.
Two months later, the 100 police officers were retested, and the results showed that
Pearson’s r was 0.719 and Cronbach’s α was 0.886. The results of confirmatory factor
analysis indicated that the fitting degree between the structural model and the sample
data was good. The Police Professional Identity Scale compiled based on the presented
theoretical model owned good robustness and predictive power, which could
effectively test the psychological traits reflected by police professional identity.