Volunteers are likely to constitute a biased sample because they
A) have been found to differ from nonvolunteers on numerous characteristics.
B) are less responsive to experimental interventions than individuals who are required to participate.
C) are more susceptible to the Hawthorne effect than nonvolunteers.
D) tend to have more conservative attitudes than nonvolunteers.

Question

Quizplus · Accepted Answer

Volunteers may differ from nonvolunteers in various characteristics such as personality, availability, and interest in the subject matter, which can lead to a biased sample. Choices B, C, and D are not universally true characteristics of volunteers versus nonvolunteers.

Volunteers Are Likely to Constitute a Biased Sample Because They