Dementia is one of the most significant issues of our time and there are varying prevailing attitudes towards dementia, including negative stigma and perception. Massive open online courses (MOOCs) are a widely available online learning resource accessed for free which may present an opportunity to address prevailing attitudes. We conducted a questionnaire before and after a six-week MOOC where participants learned about dementia. We collected data using a survey instrument and analysed them with statistical testing. Although there was no statistically significant change between pre- and post-MOOC questionnaires, the change was observed in some questions and for particular groups. Our findings indicate this MOOC has a greater effect on changing the attitudes of non-healthcare workers, older people and those living in the United Kingdom. We recommend further analysis of MOOC as a change intervention and consideration of their application in other disciplines.N/