Academic integrity is one of the significant issues facing assessments in higher education. While there are a plethora of papers addressing this problem in certain locales, very little research has been published regarding tertiary institutions in the Caribbean. This paper satisfies this paucity in the literature and present findings which will help benchmark it against other comparable populations. This mixed-methods case study examines first-year students’ perceptions of plagiarism definitions, its seriousness, reasons for plagiarising, and its prevalence in a General Chemistry (...) lab course at a Jamaican university. Quantitative and qualitative data were collected and triangulated using a questionnaire and document analysis to understand the complexity of participants’ views. The results show that students largely define plagiarism as copying portions of text and not citing someone else’s work. While accepting that copying large and small portions of text are serious offences, students are less inclined to perceive copying a picture and self-plagiarism as problematic. Although students believe plagiarism is prevalent, they oppose harsh consequences, citing lack of understanding, course difficulty, time management issues, lack of motivation, and fear of failure as understandable reasons. Institutional recommendations to mitigate this growing concern include implementing strategies that would broaden students’ knowledge of what constitutes plagiarism, employing pedagogic strategies that aim to increase students’ self-efficacy, creating a more supportive academic environment, and reducing participation in plagiaristic behaviour. (shrink)