If the object you want to speak about is too large, too small, or unavailable to use as a visual aid, you have little choice but to change the topic of your speech.

In a factorial design, which of the following terms is used to describe the influence of an independent variable on a dependent variable in isolation of other independent variables?

a. a main effect b. an interaction effect c. a between-subjects effect d. a blocking variable

The 2012 Obama campaign was able to use data gathering and social media to enhance its grassroots campaigning.  

Answer the following statement true (T) or false (F)