Teens are more likely to take bigger risks while riding a bike and have much less concern for their safety. This is due to this period of development where this is a lot of peer pressure, hormonal changes, environmental stress and so forth and they are willing to get themselves in dangerous situations more than any other age group. Having a bicycle helmet law that applies only to teens would come about due to these reasons.
The norming stage of group development is a stage of development of bonds and group identity. It is in this stage that the group develops a sense of synergy and the structure of the group solidifies. When members are in the norming stage of development, they have a feeling of togetherness and have a common set of expectations and feeling that they can accomplish more as a group than individually.
