Suppose You Do Find an Extraneous Variable That Could Have

Multiple Choice

Suppose you do find an extraneous variable that could have great influence on your results, beyond the influence of the independent variable. You could increase the experiment's sensitivity by

A) studying that variable first.
B) exposing half of your participants to the independent variable, and half to the extraneous variable, and comparing the performance of the two groups.
C) incorporating that extraneous variable as a second independent variable.
D) randomly assigning participants to experience either the independent variable or the extraneous variable.