The Royal Society Open Science is a fast, open journal publishing high quality research across all of science, engineering and mathematics. A Registered Report (RR) is a form of journal article in which methods and proposed analyses are pre-registered and peer-reviewed prior to research being conducted (stage 1). High quality protocols are then provisionally accepted for publication before data collection commences. The format is open to attempts of replication as well as novel studies. Once the study is completed, the author will finish the article including results and discussion sections (stage 2). This will be appraised by the reviewers, and provided necessary conditions are met, will be published.