Final answer:
A 2001 study showed that motor-voter registrants were less likely to vote compared to other new registrants, despite the ease of registration through the Motor Voter Act.
Step-by-step explanation:
The 2001 study found that motor-voter registrants were less likely than other new registrants to actually turn out to vote. While the National Voter Registration Act of 1993, also known as Motor Voter, simplified the registration process by allowing citizens to register to vote when they sign up for driver's licenses and other government services, it did not correspondingly lead to a significant increase in voter turnout.
Factors that contribute to lower voter turnout include being too busy, transportation problems, restrictive registration laws, frequent relocations, especially among younger citizens, and less engagement with government and politics.