ClimateMind50+ a comprehensive short questionnaire to measure climate change knowledge, worries, preparedness, behaviours, and involvement of adults aged 50 and over.

The ClimateMind50+ questionnaire is a tailored instrument to assess the knowledge, concerns, preparedness, behaviours, and involvement of individuals aged 50 and above. Older adults are particularly vulnerable to climate-related hazards such as extreme heat, flooding, and severe storms, yet their perspectives and contributions to climate resilience remain underrepresented in research. The systematic development of the ClimateMind50+ involved rigorous cognitive testing with diverse participants, ensuring clarity, accessibility, and relevance. The tool is designed for versatility in administration-face-to-face, via telephone, or self-completion-facilitating its integration across various research contexts. Cognitive testing highlighted the need for clear wording, simplified response scales, and age-appropriate framing of questions. For instance, questions on climate preparedness and sustainable practices were refined to capture lifetime actions ("ever") rather than limited timeframes, enhancing their relevance for older respondents. Additionally, the questionnaire effectively explores older adults' engagement in climate actions, from individual behavioural changes to advocacy and activism, challenging stereotypes of passivity in this demographic. By providing nuanced insights into the experiences of older adults and their potential contributions to climate mitigation and adaptation, the ClimateMind50+ offers a robust foundation for climate change research among older people. Its deployment can support policymaking and community initiatives aimed at reducing climate risks while promoting sustainable and healthy aging practices. This innovative tool underscores the importance of amplifying the voices of older adults in climate discourse and harnessing their capacities for fostering resilience.