Indirect measurement of research misconduct among Iranian postgraduate students of medical sciences using the unmatched count technique

BACKGROUND: Research misconduct poses a serious threat to academic integrity, particularly in medical sciences. This study aimed to estimate the prevalence of various forms of research misconduct include plagiarism, data fabrication or falsification, authorship misconduct, salami slicing, and purchasing research work among postgraduate students in Iranian medical universities using the Unmatched Count Technique (UCT). METHODS: A cross-sectional survey was conducted among postgraduate students from multiple Iranian medical universities using a double-list version of the unmatched count technique (UCT). The questionnaire was administered in two sequential waves, with approximately half of participants completing List A and the remaining participants completing List B, ensuring that each respondent received only one list version. For each research misconduct behavior, prevalence was estimated by calculating the mean difference in endorsement counts between lists containing the sensitive item and corresponding control lists with only non-sensitive items. In the double-list design, prevalence estimates were computed separately for List A and List B, with sensitive items counterbalanced across list positions to control for order effects. The final prevalence was calculated as the average of the two list-specific estimates, improving precision and reducing list-order bias. RESULTS: The most commonly reported misconduct was using others' ideas or phrases without proper citation (43%), followed by dishonest result reporting (38%), data fabrication or deletion (34%), and authorship misrepresentation (34%). Salami slicing was reported by 26%, and 20% admitted to purchasing parts or all of a research project. The UCT survey tool demonstrated acceptable reliability, with intraclass correlation coefficients (ICCs) ranging from 0.64 to 0.84. CONCLUSION: The findings indicate a troubling level of research misconduct among postgraduatestudents in Iran's medical sciences universities. This highlights the need for effective ethics training, stronger academic integrity policies, and enforceable institutional mechanisms to promote responsible research conduct and protect the future credibility of medical professionals.