Preregistration and a Registered Report both aim to increase research transparency, but they differ in scope, timing, and how they interact with the publication process.
Preregistration is the practice of publicly documenting your research plan—hypotheses, methods, and analysis strategy—before you collect or analyze data. You typically do this on a platform like OSF, AsPredicted, or ClinicalTrials.gov. Its main goal is to distinguish confirmatory (hypothesis-testing) analyses from exploratory ones, which reduces the risk of p-hacking or HARKing (hypothesizing after results are known). Preregistration is a personal or institutional commitment—it does not guarantee that your paper will be published, and journals may still reject it based on the results.
A Registered Report is a journal-level publication format that incorporates preregistration into the peer-review process itself. Here’s how it works:
- You submit your introduction, methods, and planned analyses to a journal before collecting data.
- The journal reviews this “Stage 1” manuscript. If accepted, the journal gives you in-principle acceptance (IPA)—a promise to publish the final paper regardless of the results, as long as you follow the approved plan.
- You then conduct the research exactly as approved.
- After data collection, you submit the full paper (including results and discussion) for “Stage 2” review, which checks for adherence to the plan and sound interpretation—not whether the results are “significant.”
Key differences at a glance:
- Timing: Preregistration is a one-time snapshot before data collection; a Registered Report has two formal review checkpoints (before and after data collection).
- Guarantee: Preregistration offers no publication guarantee; Registered Reports do (conditional on following the plan).
- Peer review: Preregistration is not reviewed by the target journal; Registered Reports undergo full peer review of your methods before you even start.
- Flexibility: Preregistrations can be updated (with transparent versioning); Registered Reports allow deviations only with documented justification and editor approval.
Which should you choose? If your goal is simply to add a timestamped record of your plans (e.g., for a thesis or a project you’re not sure where to publish), preregistration is quick and free. If you want to eliminate publication bias against null results and get early feedback on your methods, a Registered Report is a stronger commitment—and increasingly supported by over 300 journals across disciplines, from Nature Human Behaviour to Psychological Science.
If you’re organizing multiple preregistrations or Registered Report submissions, a reference manager like WisPaper’s My Library can help you track versions and related papers in one place—though the key distinction remains: preregistration is a personal record, while a Registered Report is a journal’s promise.
