In a single-blind study:

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In a single-blind study, the research participants are uncertain whether they are in the experimental or control group. This means that only the researchers know which group each participant is in. This helps to minimize the placebo effect, as participants may respond differently if they know they are receiving a treatment. Confounding variables are not necessarily eliminated in a single-blind study, and participants do not typically belong to both the experimental and control groups.

In a Single-Blind Study