What is Preregistration?
Preregistration separates hypothesis testing (confirmatory) from hypothesis generating (exploratory) research. Both are important. However, the same data cannot be used to generate and test a hypothesis, which often happens unintentionally. With preregistration, confirmatory analyses are planned in advance in order to retain the validity of their statistical inferences, and exploratory analyses are reported as post hoc investigations that might inspire confirmatory tests in future studies.