3. Internet Addiction
According to an article in the American Journal of Psychiatry, this is a disorder “that involves online and/or offline computer usage and consists of at least three subtypes: excessive gaming, sexual preoccupations, and email/text messaging.” It has several components, including excessive use, which is “often associated with a loss of sense of time or a neglect of basic drives”; withdrawal, which leads to “feelings of anger, tension, and/or depression when the computer is inaccessible”; tolerance, meaning “the need for better computer equipment, more software, or more hours of use”; and negative repercussions, “including arguments, lying, poor achievement, social isolation, and fatigue.”