Adulthood now begins at 24, scientists say

We are now considered teenagers a lot longer. Photo / 123rf

Adulthood does not begin until 24, scientists have concluded because young people are continuing their education for longer and delaying marriage and parenthood.

The traditional definition for adolescence is currently between and the ages of 10 and 19, which marked the beginnings of puberty and the perceived end of biological growth, the Daily Telegraph reports.

But, writing in the Lancet Child & Adolescent Health, scientists from the Royal Children's Hospital in Melbourne argue the timings needs to be changed.

They point to the fact that the brain continues to mature beyond the age of 20, and many people's wisdom teeth do not come through until the age of 25.

And people are also getting married and having children later, with the average man entering their first marriage aged 32.5 and women 30.6, an increase of eight years since the 1970s.

Lead author Prof Susan Sawyer, said delays in young people leaving education, settling down and becoming parents, showed adolescence was now longer and argued that policies that support youth should be extended beyond teenage years.

Countries such as New Zealand already treat children who have been in care as vulnerable until they are 25, allowing them the same rights as youngsters

"Age definitions are always arbitrary," she said, but "our current definition of adolescence is overly restricted."

"The ages of 10-24 years are a better fit with the development of adolescents nowadays."

However other academics argued that just because young people were unmarried or still in education did not mean they were not fully functioning adults.

But Dr Jan Macvarish, a parenting sociologist at the University of Kent, told the BBC: "There is nothing inevitably infantilising about spending your early 20s in higher education or experimenting in the world of work.

"Society should maintain the highest possible expectations of the next generation."

Prof Sawyer also admits there could be downsides to he plan, particularly if youngsters were no longer seen as responsible or capable of full engagement in society until they were 24.

"Such a view would risk disenfranchising adolescents and undermines their rights to fully participate in society," she added.