This is the project page for the Berkeley Initiative for Transparency in the Social Sciences (BITSS) State of Social Science (3S) study. In this project, we analyze the current status of open science attitudes, perceived norms, and behaviors, using original survey data collected from a representative sample of social scientists. We also carry out a randomized experiment of research transparency-related norms and nudge interventions, as part of the survey with the same sample. This project was conceived of and funded from the start as a longitudinal survey. For the two waves of the survey, there are three pre-analysis plan documents, described below. The analysis plan for the first wave of the survey was registered on April 3, 2018. To view the pre-analysis plan, click Registrations $\rightarrow$ View $\rightarrow$ Files $\rightarrow$ Archive of GitHub:garretchristensen-BITSS3S $\rightarrow$ src$\rightarrow$ pre\_analysis $\rightarrow$ pre\_analysis\_plan.html. Readers must save the file and open in a web browser to view the file. In 2020 we uploaded an identical version of this file to the front page of the OSF project [here][1] to provide easier access. A pre-analysis plan for analysis of only the second wave of the survey is posted under a separate OSF project [here][2]. An amended pre-registration plan for combined analysis of both waves of the survey was written in 2020 prior to launching the second wave of the survey. A copy was uploaded to this OSF project page [here][3], but unfortunately was not officially registered. [1]: https://osf.io/v3ujk/ [2]: https://osf.io/k9qm4/ [3]: https://osf.io/fetbu/