* Another reason for lying is simply to mess with surveys. This is a huge problem for any research regarding teenagers, fundamentally complicating our ability to understand this age group. Researchers originally found a correlation between a teenager’s being adopted and a variety of negative behaviors, such as using drugs, drinking alcohol, and skipping school. In subsequent research, they found this correlation was entirely explained by the 19 percent of self-reported adopted teenagers who weren’t actually adopted. Follow-up research has found that a meaningful percent of teenagers tell surveys they are more than seven feet tall, weigh more than four hundred pounds, or have three children. One survey found 99 percent of students who reported having an artificial limb to academic researchers were kidding.