Mental development is like a sum up of personal experiences and lessons of life.
Good sense of judgement, socially and emotionally active mind .. these are the aspects of good mental status.
Academic qualifications had never been parameter of mental status yes they play a vital role in expending mental health but is not necessary always , there are high chances of many highly qualified persons lagging behind in terms of mental health from uneducated ones .
Biggest reason of this could be lack of exposure to world that’s why children with over protective parents who are pampered too much and kept in a bubble of comfort are subjected more to have delayed mental growth .
Every mind had its own speed and own way to learn experiences and lessons of life and when this process and this flow of views are shielded too much then this process retards .