Tolerance

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1. Tolerance - the need for increasing amounts of time on the net to achieve satisfaction and/or significantly diminished effect with continued use of the same amount of time on the internet.
2. Two or more withdrawal symptoms developing within days to one month after reduction of Internet use or cessation of Internet use (i.e., quitting cold turkey) and these must cause distress or impair social, personal or occupational functioning. These include: psychomotor agitation, i.e. trembling, tremors; anxiety; obsessive thinking about what is happening on the Internet; fantasies or dreams about the Internet; voluntary or involuntary typing movements of the fingers.
3. Use of the Internet is engaged in to relieve or avoid withdrawal symptoms.
4. The Internet is often accessed more often, or for longer periods of time than was intended.
5. A significant amount of time is spent in activities related to Internet use (e.g. Internet books, trying out new World Wide Web browsers, researching Internet vendors, etc).
6. Important social, occupational, or recreational activities are given up or reduced because of use.
7. The individual risks the loss of a significant relationship, job, educational or career opportunity because of excessive use.