Twin Study page | Gemini Study

Thank you for being part of Gemini for the last 11-12 years. Please find the links for the online twin questionnaire and game below. If possible, please try to complete the whole questionnaire (20 to 25 minutes) and the online game (10 minutes) in a single session.
Please complete the questionnaire on a laptop, a desktop or a tablet. Please do not do the online game on a mobile phone or a tablet.

Don't use your browser's navigation buttons (e.g., Back or Refresh) during the study, as this could cause some of your progress to be lost.
Once you press 'submit' or 'save and return' you can't go back and change your answers
If you need to take a break, or your session is interrupted, you can log in again later by clicking save and return and making a note of the return code.
If you have any technical problems, try closing your browser and logging in again, or using a different browser.

Thank you for your interest in the online game. Unfortunately, the online game is no longer available as we have finished data collection for this part of the study.