Does it still measure up? A gap analysis of the Police Integrity Scale in police whistleblowing research

The crisis of legitimacy in policing, driven by cases of police misconduct, has led to increased interest in the efficacy of police whistleblowing mechanisms. However, the evidence base for understanding officer whistleblowing rests predominantly on the Police Integrity Scale (PIS). This study presents a systematic interrogation of how this measure operationalises whistleblowing, and what conceptual constraints this imposes on the field. Through a structured gap analysis of 95 studies employing the PIS, we map the evolution of its scenarios, code the representation of misconduct types and role dynamics, and examine how reporting pathways are specified. The findings reveal that the PIS, despite its status as the field's dominant instrument, narrows the whistleblowing construct in ways that limit its relevance. We identify four constraints: (1) a preoccupation with corruption that marginalises concerns such as gender-based violence and discrimination; (2) the scarcity of female officers as perpetrators of misconduct; (3) a circumscribed repertoire of supervisory failures that excludes managerial complicity; and (4) measurement parameters that preclude analysis of horizontal accountability through peer intervention. The consequence is a research literature that may underestimate the complexity of police whistleblowing, particularly regarding how gender, rank and relational dynamics shape reporting decisions. The significance of this research is its provision of an evidence-based roadmap for methodological reform, arguing that future research must extend measurement frameworks to reflect the spectrum of contemporary misconduct, integrate diverse gender and rank dynamics and develop explicit mechanisms to capture the role of peer intervention in fostering ethical policing.