Research
Preregistrations
Each study files its hypotheses, primary outcome, exclusion rules and analysis plan before the first session is scheduled. Filed documents are not edited; changes appear as dated amendments.
No preregistration is publicly listed yet. Each will appear here with its study code, filing date and protocol version once the corresponding study opens.
What a filing contains
The research question, the preregistered hypothesis and its predefined threshold, sample size and stopping rule, blinding design, inclusion and exclusion criteria, the primary outcome, any secondary outcomes, and the statistical method with the exact analysis to be run.