When an experimenter systematically varies conditions or values in an experiment he is manipulating
A) an independent variable
B) a third variable
C) a dependent variable
D) a mediating variable

Question

Quizplus · Accepted Answer

An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable. By systematically varying the conditions or values of the independent variable, the experimenter can observe the effects on the dependent variable.

When an Experimenter Systematically Varies Conditions or Values in an Experiment