Types of depression can be classified as either “normal” or “abnormal” depression. Normal depression can be caused by obvious stress, which could be the death of a loved one or a recent breakup. Abnormal depression is caused by stress that isn’t as noticeable, meaning mentally, physically, and/or emotionally (Olshan 30). Certain types of depression can occur in episodes by only
five major approaches in psychology. These perspectives have developed different theories for human/animals mind and behavior. Also, will be discussed the differences of these perspectives and the field they serve. To begin with a brief history in order to be understood the origins of psychology. The ancient Greek philosophers were considering about psychological issues. Hippocrates (400 BC) consider a relationship between personality and body. Aristotle connected the soul with the body (Barker, 2003)