When a study recruits people at large and some types of people sign up more because of a systematic difference in their behavior, our sample may be prone to which of the following types of bias?

Question

Quizplus · Accepted Answer

Volunteer bias occurs when the individuals who volunteer to participate in a study have different characteristics from those who do not volunteer, leading to a non-representative sample. This can happen when people with a particular interest or concern are more likely to sign up for a study, potentially skewing the results.

When a Study Recruits People at Large and Some Types