All the following (1–5) must be present:

  1. Is preoccupied with the Internet (think about previous online activity or anticipate next online session).
  2. Needs to use the Internet with increased amounts of time in order to achieve satisfaction.
  3. Has made unsuccessful efforts to control, cut back, or stop Internet use.
  4. Is restless, moody, depressed, or irritable when attempting to cut down or stop Internet use.
  5. Has stayed online longer than originally intended.

At least one of the following:

  1. Has jeopardized or risked the loss of a significant relationship, job, educational or career opportunity because of the Internet.
  2. Has lied to family members, therapist, or others to conceal the extent of involvement with the Internet.
  3. Uses the Internet as a way of escaping from problems or of relieving a dysphoric mood (e.g., feelings of helplessness, guilt, anxiety, depression).

From “Modification in the Proposed Diagnostic Criteria for Internet Addiction,”
Jun 2001, Vol. 4, No. 3: 377-383
by Keith W. Beard, PsyD and Eve M. Wolf, PhD.