This fully funded PhD opportunity at Monash University, supervised by Professor Monica Whitty, focuses on the study of believable mis/disinformation from a social science and psychological perspective. The successful candidate will join a world-leading cybersecurity research group dedicated to creating a safer and fairer digital world. Professor Whitty is a renowned expert in human factors in cybersecurity, with extensive experience in cyber scams, insider threats, online deception, and disinformation. The project aims to examine different types of mis/disinformation and conduct experimental studies to determine which are more believable to various audiences, drawing on psychological and social science theory. Applicants should have a strong background in psychology, sociology, information science, criminology, or media and communication studies, with training in quantitative and/or qualitative research methods (excluding discourse analysis). The research is expected to generate new knowledge about the real impact of mis/disinformation. The position offers a Research Living Allowance of $36,063 AUD per annum (2025 rate, indexed annually), $4,000 in FIT Candidature Funding, and a one-off travel grant of up to $1,265. Applicants must meet Monash PhD eligibility requirements, including a relevant bachelor's or master's degree with a research component and a first-class honours equivalent grade, or equivalent qualifications and experience. The application process involves submitting an Expression of Interest (EOI) with supporting documents and a research proposal, followed by an interview for shortlisted candidates. The deadline for applications is 20 November 2025. Monash University is committed to diversity, equality, and gender equity. This is an excellent opportunity for candidates interested in the intersection of psychology, social science, and cybersecurity to contribute to impactful research on misinformation and disinformation.