MediaLab does not currently have the ability to pause questionnaire or experiment files after you start running them. One way that you might be able to allow participants to come back to a set of questionnaire or experiment files at a later time is by using a responses.xls file to record responses. Because responses.xls files are updated after each item in a questionnaire file, you would have a record of what items participants responded to that could be used to determine what items participants should respond to at some point in the future.
Jason Reed
Empirisoft Software Support Specialist