What is a controlled experiment is one in which?

A controlled experiment is one in which the researcher manipulates one variable, the <a href="https://www.wikiwhat.page/kavramlar/independent%20variable">independent variable</a>, and measures its effect on another variable, the <a href="https://www.wikiwhat.page/kavramlar/dependent%20variable">dependent variable</a>, while controlling all other extraneous variables. This is done to establish a cause-and-effect relationship. The key elements include a <a href="https://www.wikiwhat.page/kavramlar/control%20group">control group</a> (which does not receive the treatment or manipulation) and an experimental group (which receives the treatment or manipulation). The aim is to isolate the effect of the independent variable on the dependent variable.