Abstract: A human behavior modification method and apparatus aid in withdrawing from a particular habit. A behavioral event such as smoking a cigarette may be associated with the habit numerous times over a period of time. The present method and apparatus aids withdrawal from the habit by providing a structured environment which enables one to reduce the occurrence rate of such behavioral events over a period of time in a way specifically personalized to characteristics of the user's habit. The base line behavioral pattern of a person for a specific habit is measured and used to generate a personalized withdrawal program for the specific habit and user. The user is notified of the withdrawal schedule by means of audio and/or visual stimuli, and the withdrawal program is modified as necessary based on the user's progress during withdrawal. The user interacts with the apparatus by data inputs which are processed by a microprocessor employing a series of computer programs embedded in memory.