Strayer and colleagues wanted to establish if there was a causal relationship between cell phone use while driving and increased risk of vehicular collision. The independent and dependent variables in that experiment were, respectively
A)whether or not the person was talking on a cell phone, and the braking reaction time
B)the undergraduate students with a range of driving experience and visual acuity, and whether or not the person was talking on a cell phone
C)the braking reaction time and whether or not the person was talking on a cell phone
D)whether or not the person was talking on a cell phone, and the undergraduate students with a range of driving experience and visual acuity

Question

Quizplus · Accepted Answer

The independent variable is what the researchers manipulate (in this case, cell phone use while driving), and the dependent variable is what they measure to see if it changes as a result of manipulations to the independent variable (here, braking reaction time).

Strayer and Colleagues Wanted to Establish If There Was a Causal