A system and method are disclosed for presenting on-line survey invitations to users over a network. The system selectively presents survey invitations to users in accordance with a survey recruitment definition associated with a tag embedded within a Web page (node) downloaded and executed on a user computer. A particular survey is selected from a set of presently active surveys applied by a survey logic server to received requests based upon a category (node ID) provided by a user computer in accordance with the execution of logic contained in the survey recruitment definition.