The Relationship between Internet Usage Behavior and

World Wide Web (WWW) has huge number of Web pages with various types of information and has become one of the main resources of knowledge nowadays. Since more than two billion people currently use Internet and Social network Websites, therefore exploration of different effects of Internet usage on various aspects of life of these users is very essential for both business owners and academic advisors. Outlier detection is an area of research with a long history which has applications in many fields. However, there is no specific study to identify outliers in students’ community based on their Internet usage behaviors. Major contributions of this research are:  The summary of Internet usage behavior of students (such as the average [time spent on Internet, number of visited Web pages] and the most popular visited Websites) is presented.  A group of users whose usage behavior is perceptible differences with others is identified and introduced as Outliers.  The relationships between Internet usage behavior and medical problems in both normal users and Outliers have been studied. General Terms Medical Problems, Internet Usage patterns