A method and apparatus for assigning a survey to a respondent are provided. According to one technique, a set of one or more screening questions are generated and provided to the respondent. Input data is received in response to the respondent answering the set of one or more screening questions. Based...http://www.google.fr/patents/US6993495?utm_source=gb-gplus-shareBrevet US6993495 - Dynamically assigning a survey to a respondent
