Who remains blind to the expected behaviors in a double-blind study?

In a double-blind study, both the participants and the researchers conducting the study are unaware of critical aspects that could influence the outcomes. This design is implemented to eliminate bias and ensure that neither the expectations of the participants nor the researchers affect the results of the experiment.

By keeping both parties uninformed, the study aims to achieve more objective results. This is crucial because if either the participants or the researchers had knowledge of which individuals were receiving the treatment versus a placebo, their behaviors or interpretations might inadvertently introduce bias. For example, participants might change their behavior based on what they believe they are receiving, or researchers might unintentionally influence outcomes based on their expectations.

Thus, it is correct to state that in a double-blind study, both groups remain blind to the expected behaviors related to the treatment and control conditions, ensuring that the findings are due to the manipulations of the study rather than biases from either party.