(PSYCHIATRIC TIMES) - Ever since the idea emerged that objects have the capacity to influence psychological states, the idea that almost any subjectively rewarding activity (e.g., drug use, shopping, working, running, gambling) can become the object of addiction has become increasingly popular (Shaffer 1999b, 1997).
The UCLA Internet Report (Cole et al., 2000) is one of few studies of randomly selected community samples available to illuminate the epidemiology of computer or Internet usage patterns. However, one prospective study of Internet use examined its impact on 169 people in 73 different households during their first one to two years online (Kraut et al., 1998). Used extensively for communication, greater Internet use in this study was associated with declines in participants' communication with family members in the household and in the size of their social circle, as well as increases in their depression and loneliness. Nevertheless, with the exception of watching less television, new research reveals that Internet users may not be very different from their non-Internet user counterparts on a variety of important dimensions (Cole et al., 2000). Given this conflicting evidence, more longitudinal research is necessary to understand the impact of computer technology on cognitive and emotional patterns of experience.
The growth of the Internet has been accompanied by a growing concern that excessive use is related to the development of what has been called "Internet addiction," "Internet addiction disorder" and "pathological Internet use." People struggling with Internet addiction report a compelling need to devote significant amounts of time to checking e-mail, participating in online chat rooms or surfing the Web, even though these activities cause them to neglect family, work or school obligations. These intemperate problems reflect a user's loss of control over Internet use, increasing involvement with the Internet and an inability to stop this involvement in spite of adverse consequences associated with such use.
Although the rate of this behavior pattern is unknown, proponents of the Internet addiction construct suggest that the problem is growing as more people have access to the Internet and its associated computer technology (Young, 1998, 1996). Yet it has not been established whether excessive Internet or computer use causes or reflects psychopathology, nor whether it has meaningful adverse impacts on social patterns. (For a more detailed examination of these issues, please see Shaffer et al., 2000.) It also remains to be determined whether excessive Internet or computer use represents a source for existing family problems that previously had been attributed to other sources (Oravec, 2000).
A Plea for More Cautious Conceptual Development
Jean Rostand once said, "Nothing leads the scientist so astray as a premature truth." Young (1996) and Young and Rogers (1998) adapted the American Psychiatric Association's criteria for pathological gambling to develop a measure for Internet addiction. An understanding of pathological gambling is just emerging, however, and many questions remain regarding its nature relative to a panoply of comorbid psychiatric disorders (Committee on the Social and Economic Impact of Pathological Gambling and Committee on Law and Justice, 1999; Shaffer 1999a, 1999b, 1999c, 1997). Thus, it is premature to adopt these criteria as the basis for Internet addiction guidelines.
Much remains unknown about the overlap among various mental disorders with excessive computer use. Even if new research satisfactorily demonstrates that the prevalence of computer addiction is relatively stable and robust, epidemiologists also must establish that this phenomenon represents a unique construct. We must ask, "When is computer addiction, computer addiction?" For example, Blaszczynski and Steel (1998) reported that of 82 consecutive treatment seekers for gambling-related problems, 93% met diagnostic criteria for at least one personality disorder, with the average patient experiencing at least four overlapping personality disorders.
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