Defense mechanism of Freud         This mechanism well explains the human's behavior, although    it is just an assumption on which Freud based when curing    mental patients rather than proven scientific fact. According to this theory, this mechanism is indispensable to    human life; Why? Types of defense mechanism and examples   What is wrong with 'abnormal' persons? In contemporary psychology, what is the standard to   distinguish between 'normal' and 'abnormal'?:        Objective standard, Subjective standard