Going live


It is advised to first test your reader study. To be able to do this you should first add yourself as a reader (this is not automatically done). Go to Readers → Add Readers and add yourself with your own grand-challenge username. Once this is done click 'Launch this Reader Study' which opens a session in which you can test the reader study.

Editors are still able to modify the reader study after it has been launched. You can clear your previous answers by going to Users Progress → Delete Users Answers.

When you are happy with your reader study, you can invite participants with the following steps:

  1. Each participant should register at grand-challenge.org and send you their username
  2. Go to the Readers → Add Readers and add their name
  3. Readers can then go to https://grand-challenge.org/reader-studies/your-reader-study/ to launch the Reader study

To see reader study progress per participant go to Users Progress.

If you uploaded a ground truth you can see details on the responses per case and per question from Statistics. Also at Leaderboard a leaderboard is shown with all participants ranked based on their performance.

If you want to export the results go to Export to download the data. All information is stored in different csv files which all can be downloaded separately. The first file that can be downloaded contains all the characteristics of the reader study such as settings, title and hanging list. The second file contains all questions and their settings. Next there are separate files containing all the images and answers. Note that these files only store up to 1000 images or answers. If the number of images or answers exceeds 1000, multiple csv files will be created. Alternatively, you could use the Grand Challenge API Client to download your results through Python.