Yes the answer is number 4
The correct answer is case study.
A case study is a method of psychological research that involves collecting in-depth information and data about an individual person or animal. Information gathered from case studies can be from a combination of questionnaires, interviews, observations etc. Case studies can be conducted when investigating any psychological phenomena, however, they are most useful when investigating psychological or mental disorders.
Answer:
Bipolarity is an example of a(n): Stigmatized illness.
Explanation:
When a person suffers from a disease, and this disease is stigmatized, this person's restrictions worsen and the chances of making up for his/her disability are less. This leads to discrimination in several contexts such as the health care system and social environments, making it really difficult for the person to talk about what she/he is going through. Some of the diseases which are commonly stigmatized include mental disorders, AIDS, and some skin affections.