what is the best way for a researcher to avoid unconsciously signaling any point of view to the participants in a study?

How does the event and i know why the caged bird sings most influence maya angelou’s later poem the caged bird?

Knowing that you will be punished for breaking mom's favorite dish is a function of the

Martha participates in a research study in order to receive extra credit for her psychology class. when she arrives in the research office she is given a can of what looks and tastes like beer, but which actually contains no alcohol. in the adjoining room martha's classmate karen is also participating in the study. karen receives a can of alcoholic beer. if the experiment was designed to test the effects of alcohol on concentration, then who is exposed to the independent variable?