Abstract
Despite legislative protections, employees with disability disclose to their employer's formal human resource systems at rates substantially below population prevalence. This randomised controlled trial evaluated behaviourally informed email prompts to increase disability disclosure rates in a large Australian public sector organisation. Employees (N = 12,000) were randomly assigned to receive emails that requested them to record disability in the human resource system using: (1) standard prompt (control); (2) routine census survey framing; (3) privacy assurances; or (4) inclusive social definition of disability, with intervention arms receiving two email reminders. The Definition condition achieved the highest disclosure rate. Privacy treatment arms also showed significant improvements. Email engagement was high across all conditions, with census framing (used as base text for treatment arms) and reminders boosting engagement further. Reducing ambiguity about what constitutes disability and who can and cannot access disability data, while framing disclosure as routine census activity effectively overcame key psychological barriers to disclosure and engagement with diversity reporting. Findings have important implications for workforce reporting and organisational inclusion strategies.