![]() By using a single-blind procedure and not telling the participants what they are looking for, the people who are in the study are less likely to inadvertently bias the results. If participants knew that the researchers were testing a hypothesis that the drug increased alertness, they might start acting more alert after ingesting the medication. Example of a Single-Blind Studyįor example, imagine that researchers are doing a study to determine if a certain type of medication causes people to feel more alert. The placebo effect occurs when a person unconsciously notices improvement because they have been told that the treatment they have received has therapeutic power. A single-blind study can help prevent this or minimize the effects of such demand characteristics. Double blind study definition The reason half of the participants are not given the antidepressant is basically to prevent the placebo effect from biasing the research results. This can lead them to change their behavior, which can ultimately skew the results. Double-blind studies are those in which neither the participants nor the experimenters know who is receiving a particular treatment.Sometimes participants in a study will try to guess what a study is about or what they think the experimenters are hoping to find. Double-blind definition: A double-blind study or experiment compares two groups of people, one of which is being.The reason for keeping participants in the dark about what the researchers are looking for and what treatment they are receiving is to try to prevent participants from altering their behavior to conform to what they think the researchers expect. ![]() ![]() The key that indicates in which group each participant belongs to is kept by a third individual and not given to the experimenter until the study is over. What is Psychology? A Study Through Concepts The double-blind design describes an experimental procedure in which neither the participant nor the experimenter are aware of which group (i.e., experimental or control) each participant belongs to. ![]()
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