according to many social scientists ,adolescence ends for most people ?

Check this site.

http://en.wikipedia.org/wiki/Adolescence

In industrialized societies, adolescence is a transition between childhood and adulthood. In many primitive societies, there is no adolescence. After going through a specific ritual, the child is considered an adult.

With the increase in complexity of industrialized societies, more skills need to be acquired to be considered an adult.

Depending on their group membership and the definition of adult, this occurs at varying times in our culture. In Judeo-Christian terms, the children are considered adults religiously upon completion of bar/batmitzvah or confirmation at about the age of 13. However, they are not considered adult enough in most states to get a driver's license until about 16. Depending upon the state laws, ages for legally drinking alcohol, getting married without parental permission, voting and legally owning a gun will vary, usually between 18-21.

Thus adolescence has become a relatively confusing "no man's land," in which the adolescents no longer consider themselves to be children, but most adults do not consider them to be adults.

Here are some articles that might be helpful.

http://www.members.cox.net/dagershaw/lol/Myths.Adolescent.htm
http://www.members.cox.net/dagershaw/lol/AdolIndepend.html
http://www.members.cox.net/dagershaw/lol/SuicideTeen.html
http://www.members.cox.net/dagershaw/lol/TeenDecisions.html
http://www.members.cox.net/dagershaw/lol/TeenTurmoil.html
http://www.members.cox.net/dagershaw/lol/AIDSTeens.html

I hope this helps. Thanks for asking.

According to many social scientists, adolescence ends for most people in industrialized societies as a transition between childhood and adulthood. However, the timing can vary depending on cultural and legal definitions of adulthood. In Judeo-Christian terms, religious adulthood is often reached at about the age of 13 with the completion of bar/bat mitzvah or confirmation. In terms of legal adulthood, different milestones like getting a driver's license, drinking alcohol, getting married without parental permission, voting, and owning a gun can vary in age between 18-21 depending on the state laws. This means that adolescence can be a confusing phase where individuals no longer consider themselves children but are not seen as adults by most.

To learn more about this topic, you can check the Wikipedia page on adolescence (http://en.wikipedia.org/wiki/Adolescence) as it provides an overview of the subject. Additionally, the links provided in the response might be helpful for further reading on the different aspects and challenges of adolescence.