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Chapter 2-2: Problems & solutions in research
An experiment in which the participants are unaware of which participants received the treatment.
An experiment in which neither the experimenter nor the participants know which participants received which treatment.
The group that does not receive the experimental treatment.
Change in a participant's illness that results from a belief that the treatment will have an effect.
A situation in which a researcher's expectations influence that person's own behavior, and thereby influence the participant's behavior.