AP PSYCHOLOGY

Detailed explanation-1: -Roughly half of all lifetime mental disorders in most studies start by the mid-teens and three quarters by the mid-20s. Later onsets are mostly secondary conditions. Severe disorders are typically preceded by less severe disorders that are seldom brought to clinical attention.

Detailed explanation-2: -While you still have a lot to learn, you probably feel like the development process is over. Mentally, however, as a young adult, you’re still not fully grown. Young adults, aged 18 to 29, are still experiencing cognitive development, and this is one of the reasons why mental illness can present at this time of life.

Detailed explanation-3: -Although schizophrenia can occur at any age, the average age of onset tends to be in the late teens to the early 20s for men, and the late 20s to early 30s for women. It is uncommon for schizophrenia to be diagnosed in a person younger than 12 or older than 40.

Detailed explanation-4: -The vast majority of mental disorders diagnosed in adulthood show a peak age of onset before 18, and other disorders carry across from childhood/adolescence well into adulthood.