RESEARCH METHODOLOGY

Detailed explanation-1: -A controlled experiment works with one variable at a time. If several variables were changed at the same time, the scientist would not know which variable was responsible for the observed results. 3. In a “controlled experiment” only one variable is changed at a time.

Detailed explanation-2: -A controlled experiment is an experiment in which only one variable is changed at a time. All other variables should be kept unchanged or controlled.

Detailed explanation-3: -noun. plural controlled experiments. : an experiment in which all the variable factors in an experimental group and a comparison control group are kept the same except for one variable factor in the experimental group that is changed or altered.

Detailed explanation-4: -A control variable (or scientific constant) in scientific experimentation is an experimental element which is constant (controlled) and unchanged throughout the course of the investigation.

Detailed explanation-5: -An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. A dependent variable is the variable being tested and measured in a scientific experiment.