What type of study is known as a "blind study"?

A "blind study" refers to a research design in which participants do not know their group assignments, typically whether they are in the experimental group receiving the treatment or in the control group receiving a placebo or no treatment. This design is used to minimize bias, as it prevents participants' expectations or behaviors from affecting the outcomes of the study. By keeping participants unaware of their group status, researchers can more accurately assess the effects of the treatment or intervention being studied.

In this context, it is important to understand that blind studies are a common practice in clinical trials and other experimental research. By ensuring that participants are unaware of their group assignments, researchers can gather more reliable data, leading to more valid conclusions about the effects of the treatment or intervention.