How could you reduce participant bias in research?

How could you reduce participant bias in research? Can it be…

 

How could you reduce participant bias in research? Can it be accounted for to better understand the influence of expectations?

What are ways to reduce participant bias?
Utilizing blind studies and lowering demand characteristics are two ways to prevent participant bias. Participants could change their behavior because they are aware that they are a part of a study, which can result in a lack of validity.
Why is it important to reduce bias in research?
Bias causes false conclusions and is potentially misleading. Therefore, it is immoral and unethical to conduct biased research. Every scientist should thus be aware of all potential sources of bias and undertake all possible actions to reduce or minimize the deviation from the truth.