Organizational Citizenship Behavior (OCB) refers to voluntary, extra-role behaviors that support organizational functioning. Initially, direct supervisors completed assessments of subordinates; later, the practice shifted to self-report instruments, which may be biased toward attitudes rather than actual behaviors. This study introduces a scenario-based instrument to assess OCB through behavioral intentions and compares it with an OCB questionnaire that measures attitude. Drawing on theories of Belief in a Just World (BJW), Leader-Member Exchange (LMX), and Perceived Organizational Justice, we have explored how these constructs relate to OCB in a Hungarian sample. Data were collected from 191 employees via online platforms, excluding top-level managers, in order to focus on lower hierarchical levels. Factor analysis of the scenario-based tool resulted in a reliable 10-item measure. Correlations indicated moderate convergence between the frequently used questionnaire and situational tools we developed (r = .398, p < .001). Both instruments showed expected associations with interpersonal justice, BJW, and LMX, though correlations were generally modest. Findings suggest that scenario-based measures capture behavioral intentions more effectively than attitudes, providing complementary insights into OCB. Limitations include sample size and the weak functioning of the Sportsmanship dimension.
