Drews Et Al

Multiple Choice

Drews et al.2008) manipulated driving conditions i.e., driving while talking to a friend on the cell phone and driving while talking to a friend in the car) to see if this influenced the number of driving errors committed.Participants completed the task on a driving simulator.In this design, the driving condition served as the __________.

A) measure of ecological validity.
B) dependent variable.
C) independent variable.
D) measure of reliability.