According to erikson, if the psychological conflict of adolescence is resolved negatively, a young person experiences

According to erikson, if the psychological conflict of adolescence is resolved negatively, young person experiences initiative versus guilt

people in adolescence age tend to be really curious and started to questions everything that threw out at them (including ethics and norms) which often caused conflict within their mind.

When these conflicts resolved negatively, those who succumb will overwhelmed by guilt and those who don't will rebel