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self-selection bias |
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self-selection bias [¦self si¦lek·shən ′bī·əs] (statistics) Bias introduced into an experiment by having the subjects decide themselves whether or not they will receive treatment. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| The principal limitations of the survey are associated with the mechanism chosen to administer the questionnaire, certain details of the questionnaire format and wording, and the potential for self-selection bias. The possibility of a self-selection bias is important to examine because we hypothesize that participation in the program might have a differential effect; we need to be alert to fallacious causality. Since it is very difficult to obtain a random sample of Internet users on sexuality-related sites, and since respondents to Internet questionnaires are usually subject to some sort of self-selection bias, there are difficulties in interpretation of data. |
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