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Massive Research Lab lets you build an online psychology experiment, preregister it, run it with real participants, and share it openly — all in one place.

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The shape of the work

1

Build

Assemble your study from blocks (questions, stimuli, timers, media tasks) in the Builder. No coding.
2

Preregister (optional)

Freeze a version and push it to the OSF so your hypotheses are timestamped before data collection.
3

Run

Open recruitment and share a link, or recruit a balanced sample through Prolific.
4

Share

Make the study public so others can read, cite, and replicate it.

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Five-minute path

  1. Sign up and create your first workspace.
  2. From Explore or Studies, click Start building — you land in the Builder on a fresh draft.
  3. Add a few blocks, set any conditions or variants you need.
  4. Use Preview to take the study exactly as a participant would.
  5. Publish (or preregister) to make it runnable, then open recruitment on the Run stage.

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Key ideas

  • Workspace — your team’s container for studies, members, and connections. You can belong to several.
  • Draft → frozen version — autosaves are your live draft; preregister or publish freezes an immutable version you can run and cite.
  • Replicate — copy any public study into your workspace as a faithful starting point.
Next: Sign up →