Statistics and Probability Dictionary

Select a term from the dropdown text box. The online statistics glossary will display a definition, plus links to other related web pages.

Select term:       

Voluntary Response Bias

In survey sampling, voluntary response bias occurs when sample members are self-selected volunteers, as in voluntary samples .

An example would be call-in radio shows that solicit audience participation in surveys on controversial topics (abortion, affirmative action, gun control, etc.). The resulting sample tends to overrepresent individuals who have strong opinions.

See also:   Bias in Survey Sampling