A prison administration wants to know whether the prisoners think the guards treat them fairly. Explain how

Question:

A prison administration wants to know whether the prisoners think the guards treat them fairly. Explain how each of the following components could be used to produce biased results, versus how each could be used to produce unbiased results:
a. Component 2: The researchers who had contact with the participants.
b. Component 4: The exact nature of the measurements made or questions asked.