Parents, there is no need to worry much if your teenage kid is throwing tantrums, and just wait for him or her to land the first job. Narcissism -- being full of yourself, sensitive to criticism and imposing your opinion on others -- declines over time and with age especially with the first job, new research has revealed.

However, some character traits like having high aspirations for yourself increased with age, said the team from Michigan State University (MSU).