Worlds and Assignment

TurkServer uses Meteor’s powerful publication-based data model to create multiple worlds or instances within which data can be synchronized among a group of users in real time. This makes it easy to build and study mechanisms of real-time interaction. However, the real utility of this abstraction is the ability to create new worlds and assign or re-assign users among them, allowing for flexibility of many experiment designs while keeping programming simple.

TurkServer uses the concept of batches to logically group instances of experiments together. Each batch allows for some high-level parameters to be set, such as a limit on repeat participation.

Each batch has a lobby or waiting area, a state that users are in when they are not part of any world. An assigner controls the state of the waiting area and therefore can arrange arriving or returning users to different worlds.

A world can return users to the lobby once a task is complete, allowing for users to be assigned to different groups, matched with different partners, and so on. The assigner can also send users to an exit survey to complete the task and debrief.


To be completed.

Additional References

TurkServer’s multiple worlds abstraction is implemented by the partitioner package in Meteor, which was written specifically for TurkServer.