Disabling a study

You can disable a study in the expt.xml file by adding the disable="URL" attribute to the study.  Anyone who tries to take the study will instead be sent to the URL that you specify.  Using this can be an advantage for private link studies, where you want people clicking the link after the study has ended to get a page telling them that the study is expired.  For example, to send someone trying to take your study to a more important study:

<Study id="Demo.Skin" datagroup="std" disable="http://humanoralien.com">