Participation bias
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It has been suggested that this article be merged with Non-response bias. (Discuss) Proposed since April 2015. |
Participation bias is a phenomenon in which the results of elections, studies, polls, etc. become non-representative because the participants disproportionately possess certain traits which affect the outcome. For instance, a study found that those who refused to answer a survey on AIDS tended to be "older, attend church more often, are less likely to believe in the confidentiality of surveys, and have lower sexual self disclosure."[1]
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