# Massive Research Lab

> Build, preregister, run, and share psychology experiments.

## Docs

- [Block catalogue](https://docs.myresearchlab.app/builder/blocks.md): Every block you can add to a study, grouped by what it does.
- [Conditions](https://docs.myresearchlab.app/builder/conditions.md): Show or hide blocks based on earlier answers.
- [Themes](https://docs.myresearchlab.app/builder/themes.md): Control how the study looks to participants.
- [Variants](https://docs.myresearchlab.app/builder/variants.md): Split participants across version-level arms (A/B and factorial).
- [Quickstart](https://docs.myresearchlab.app/getting-started/quickstart.md): From sign-up to a running study in about an afternoon.
- [Signing up](https://docs.myresearchlab.app/getting-started/signing-up.md): Create your account and your first workspace.
- [Your first study](https://docs.myresearchlab.app/getting-started/your-first-study.md): Build, preview, publish, and run a study end to end.
- [Anthropic (Claude)](https://docs.myresearchlab.app/integrations/anthropic.md): Bring your own Claude API key for AI-assisted blocks.
- [OSF (Open Science Framework)](https://docs.myresearchlab.app/integrations/osf.md): Connect OSF to preregister and publish your study record.
- [Prolific](https://docs.myresearchlab.app/integrations/prolific.md): Recruit a balanced participant sample from the Run stage.
- [IRB & data-handling checklist](https://docs.myresearchlab.app/methodology/irb-checklist.md): Run ethical, privacy-respecting studies.
- [Preregistration](https://docs.myresearchlab.app/methodology/preregistration.md): Timestamp your plan before you collect data.
- [Replication](https://docs.myresearchlab.app/methodology/replication.md): Copy a published study and re-run it faithfully.