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Often you want to store information during a study run and share it with other components of the same study, or - if it is a group study - within the group. For this JATOS provides the Session Data. There are two different Session Data types, both of which are stored temporarily in your database, and will be deleted once they are no longer in use.

The difference between session data and the result data is that the results are stored permanently in the database, and will stay there after the study is finished. All results should therefore go into the result data.

Study Session Data

The Study Session Data is useful to share information between components of a given study. Some examples include:

  • Sending information about percentage of correct responses in component 1 to component 2.
  • Having a study-wide progress bar, showing how much of the entire study has been completed.
  • Keeping track of the number of iterations of a given component that is repeated.

Group Session Data

The Group Session Data is useful to share information between members of a given group. Some examples include:

  • Responses to each trial in a group study like the Prisoner’s Dilemma
  • gender of group members