Response Bias

Response Bias: Error that results from the fact that people who respond to a survey might not have the same opinions as those who do not respond.
Response Rate: The percentage of people invited to participate in a survey.

response bias
the inclination of respondents in a marketing research survey to give the answer that they believe the interviewer wants to hear
response elasticity ...

Today, however, this type of response bias is probably not significantly greater than that associated with other types of research methods.

See also: Family, Sampling, Variable, Research, Product