26. The method as claimed in claim 25 , wherein the content generator comprises an uploading interface for digital content representing an attribute level for one or more attribute levels.
25. The method as claimed in claim 19 , wherein the step of creating a plurality of survey template pages is performed using a survey assembly user interface comprises: a content and layout user interface for receiving content and layout parameters from a user and generating a plurality of survey template pages; wherein at least one of the plurality of survey template pages comprises at least one treatment display zone; wherein each treatment display zone comprises one or more associated layout parameters; and a content generator interface for generating a visual representation of each treatment for use in a treatment display zone.