Cell phones and caller ID have dramatically reduced the problem of selection bias in public opinion surveys.

Question

Quizplus · Accepted Answer

Cell phones and caller ID have actually increased selection bias in public opinion surveys. This is because people who only use cell phones, and those who screen their calls using caller ID, are less likely to respond to surveys conducted via landline phones. As a result, surveys relying only on landline phone samples may not be representative of the entire population.

Cell Phones and Caller ID Have Dramatically Reduced the Problem