In psychology, abnormal behavior can be defined as a deviation from the norm. This is common where the statistical behavior is normal in the statistical behavior of a rare anomaly. The following criteria used to determine the person in normal or not.
• Deviation from the statistical norm - Many people are in the middle range of intelligence, height and weight. For example, many people fall into the range of average intelligence, but a small percentage above and below the average. Thus, under this definition, people who are either extremely wise or foolish as to be classified as abnormal. ...