Once you have established a problem that can be studied empirically the next step is to identify the variables that will be investigated.How many variables that can change throughout an experiment should a researcher investigate?
A) Only one variable should change throughout the experiment.
B) There are exactly three variables that should change throughout the experiment.
C) The number of variables that change can differ based on the particular research question.
D) It is impossible to limit the number of variables that can change throughout an experiment.

Question

Quizplus · Accepted Answer

Only one variable should change throughout the experiment, known as the independent variable, to ensure that any observed effects can be attributed to changes in this variable, while other variables (controlled variables) are kept constant to prevent them from affecting the outcome.

Once You Have Established a Problem That Can Be Studied