**Project Overview** Ideology 2.0 is a massive, multivariate, planned missing data design that collected data on Project Implicit from December 2007 to June 2012. It is one giant study with over 280,000 unique sessions, ~40 implicit measures, ~30 self-report items on the same topics as the implicit measures, 25 individual difference questionnaires, and dozens of individual self-report items. For a given session, participants are randomly assigned to complete a small subset of the measures (15 minutes’ worth). Participants can complete as many sessions as they wish. There are no constraints on whether a participant will see the same measure again between sessions. In Fall of 2022, an exploratory portion of the Ideology 2.0 dataset was made available to researchers to develop Stage 1 Registered Reports submissions to journals based on the dataset. Upon in principle acceptance by the journal, Registered Report authors then receive the confirmatory portion of the dataset to complete their Stage 2 submission for resubmission to the journal. Details of the initiative and how to obtain access to the exploratory portion of the dataset are [here][1]. This project contains a study overview, data codebook, and survey materials to familiarize interested researchers with the contents of the dataset. **Study Overview**: [osf.io/pckbd][2] **Codebook**: [osf.io/h73wq][3] **Materials**: [osf.io/4fjn3][4] [1]: https://docs.google.com/document/d/12jmUlXguhFWjqMx2lHGrF8sFANbrJdaWhINfO-2DjMc/edit [2]: https://osf.io/pckbd [3]: https://osf.io/h73wq [4]: https://osf.io/4fjn3/