Blinded study

Blinded study

A blinded study (pronunciation: /ˈblaɪndɪd ˈstʌdi/) is a type of research design in which the participants are unaware of certain aspects of the study to prevent bias. The term originates from the concept of "blinding" or "masking" information from the participants or researchers.

Definition

A blinded study is a method used in biomedical research and psychology to prevent research bias. It involves concealing certain information from the participants, researchers, or both, to prevent their knowledge or expectations from influencing the results. The aim is to achieve more reliable and objective results.

Types of Blinded Studies

There are several types of blinded studies, including:

• Single-blind study: In a single-blind study, the participants do not know whether they are in the experimental group or the control group. This helps to prevent placebo effects or bias based on expectations.

• Double-blind study: In a double-blind study, both the participants and the researchers do not know who is in the experimental group and who is in the control group. This helps to prevent both placebo effects and observer bias.

• Triple-blind study: In a triple-blind study, the participants, researchers, and the statisticians who analyze the data do not know who is in the experimental group and who is in the control group. This helps to prevent bias at all stages of the research process.

Related Terms

• Placebo effect
• Observer bias
• Randomized controlled trial
• Experimental group
• Control group

See Also

• Clinical trial
• Research design
• Biomedical research
• Psychology

External links

• Medical encyclopedia article on Blinded study
• Wikipedia's article - Blinded study

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