A key characteristic of Web surveys is their diversity. Unlike other modes of data collection, where the method tells us something about both the sampling process and the method of data collection, the term "Web survey" is too broad to give us much useful information about how the study was carried out. For example, referring to an RDD telephone survey describes both the method of sampling (in part) and the mode of data collection. But there are so many different ways to identify sampling frames for Web surveys, to invite people to complete such surveys, and to administer surveys over the Internet (see Couper 2000) that the term "Web survey" conveys little evaluative information.