In accordance with the present invention, a controller such as an online service provider computer or an ISP computer receives a survey including survey questions from a client desiring to have a survey conducted. The controller creates respondent questions based on the survey questions. The controller also selects one or more respondents from a list of possible respondents, such as a list of customer accounts. The respondent questions are transmitted to the selected respondents. Responses corresponding to the respondent questions are received. The controller applies an inconsistency test to the responses to generate an inconsistency test result. The inconsistency test determines if the responses originate from computers or humans not paying attention to the questions. Based on the inconsistency test result, a fraud signal may be generated. The fraud signal may result in several actions, such as the controller ignoring the responses received from the corresponding respondent, reducing or eliminating payment to the respondent, transmitting a message of reprimand to the respondent, and/or barring the respondent from future participation in surveys.