What are the two defining features of an experiment?
A) control of extraneous variables; statistical analysis of the results
B) statistical analysis of the results; a comparison of two groups
C) a comparison of two groups; manipulation of an independent variable
D) manipulation of an independent variable; control of extraneous variables

Question

Quizplus · Accepted Answer

The two defining features of an experiment are manipulation of an independent variable and control of extraneous variables. Manipulating the independent variable allows the researcher to see the effect of this variable on the dependent variable while controlling extraneous variables helps isolate the effect of the independent variable.

What Are the Two Defining Features of an Experiment