According to Merriam-Webster medical dictionary depression is a mood disorder marked especially by sadness, inactivity, difficulty in thinking and concentration, a significant increase or decrease in appetite, time spent sleeping, feelings of dejection, hopelessness, and sometimes suicidal tendencies. Although adults can experience depression there seems to be higher rates in young children and teens. This article explains the different internal and external factors that play a role into how depression sets in. During adolescent years youth are going through changes and are often worried about self-image and acceptance with their peers. The authors of this article explains the different factors of depression, the different levels of depression, along with prevention.This article explains the many risk factors that put adolescents at risk such as family, school, peers. To begin with children are already at genetic predisposition from their parents. Unfortunately being born with it is something that is out of their control. While in the school environment difficult grading practices are stressful. Since it is well-known that getting a higher education can lead to a better quality of life, children can be overloaded with courses and schoolwork. Not doing well in school or receiving a bad grade can hurt a child’s self esteem. The article points out how low peer popularity is related to depression, adolescents who have less contact with friends and experienced rejection have a greater risk for being depressed. Poor peer relationships can lead to isolation which can also be a contributing factor.This article mentions three different types of depression and explains the difference between each. For example a depressed mood is something that anyone can experience which can last for a short, or extended amount of time. It may be a result of one or many problems. Periods of depressed mood can occur as a response to situations such as the failure of an important task or loss of a significant relationship. Next the authors explain depressive syndrome, it states that there is a multivariate approach to assess adolescent psychopathology which shows that depression is associated with other problems. Such as crying, paranoia, nervousness, feeling lonely, and self-consciousness. Finally the article mentions clinical depression which was developed by the American Psychiatric Association and the World Health Organization. It bases diagnosis of disorders on a review of presence, duration, and severity of symptoms. Teens can be diagnosed with Major Depressive Disorder or dysthymia disorder. For MDD they have to experience five or more symptoms over a two or more week period of irritability, decreased intrest, changes in weight, sleeping problems and etc. While a dysthymic disorder is diagnosed when an adolescent has had a period of at least a year in which he or she has shown a depressed or irritable mood every day without being being symptom free for two months.The authors of this article mention some ways to prevent depression. The authors say that one way to prevent depression is just to assume all children are at risk for it and delivering preventive services to entire populations. By doing so the overall risk for depressive disorders might be reduced. The second way the authors mention is to selectively target those who have been exposed to an identifiable risk. Saying that services can be delivered to those who are in greatest need. The article also mentions treatment using psychosocial and psychotherapeutic methods, saying that studies that involved controlled groups all provided conformation that depressive disorders or mood can be reduced using one treatment or the other.