Gardner and steinberg (2005) arranged a study in which adolescents and older adults played a simulated driving game either alone or with peers. the researchers measure risky behavior in terms of the number of crashers that occurred during the game. they found that the presence of peers

The researchers found that adolescents are more likely to take risks and exhibit risky decision making in a driving task when in the presence of peers than when alone compared to their adult counterparts.

Explanation:

This was determined by Gardner and Steinberg (2005) during a study of adults and adolescents risk taking in a driving task.It was found that social influence is a factor which also determines risk taking especially in adolescents. The study gave credence to the notion that peer influence plays a role in adolescents risky behavior and the impulse to take risks.

could you go a bit more in depth with you question? it's quite hard to understand. as soon as you do that i will be glad to : )