People has different personalities one to the other. Each person has personality since their in the childhood. The past time will give you big influence in you later personality. Some researcher or psychologist say that it is not easy to know about human personality but we can make a decision that what their personality is the result of their environment including their childhood. Parents will really influence children’s personality. When children always get bad treatment when they are child, we can know that they will have mental disorder. You must know what is Schizophrenia? It is mental disorder that makes people have hallucination, delusions, and wrong way of thinking and speech. You can know some schizophrenia symptoms but before we know about it is good for us to know the reasons of schizophrenia. There are so many things that can make people get their schizophrenia. First it is because of genetic. There is something wrong in their genetic and it is usually comes from their parents. This error genetics will make them is disorder. They often have bipolar disorder too.