Relationship Between Loneliness and Internet Addiction: Testing of Serial Mediation and Moderated Mediation Models of Interpersonal Problems and Motivation for Internet Use

Abstract

Background In the era of high-speed internet, using the internet regardless of platform might be considered a part of everyone’s daily activities. A number of factors have been demonstrated to be associated with internet addiction, which is mostly concerned with psychological problems such as loneliness. This study aimed to examine how and in what way loneliness has influenced internet addiction. Specifically, we proposed and tested interpersonal problems and motivation for the internet as intervening variables of the relationship between loneliness and internet addiction. Methods Self-report measurement on loneliness, internet addiction test (IAT) and interpersonal problems consisting of domineering, vindictive, cold, socially inhibited, nonassertive, overly accommodating, self-sacrificing and intrusive, were administered to 318 medical students (57% females); mean age was 20.88 (SD, 1.8), to test whether interpersonal problems mediated the relationship between loneliness and internet addiction in the mediation model. In addition, motivation for internet use was added to the mediation model and tested whether it was the second mediator (serial mediation model) or a moderator (moderated mediation model). Results After controlling for sex and age, socially inhibited problems exhibited full mediation whereas the remainder had partial mediation effect, with the exception that intrusive and cold interpersonal problems had no mediating role. Negative motivation and motivation for being accepted had mediation effects for all styles of interpersonal problems. Motivation for working was found to be a significant mediator and moderator of the most interpersonal problems. Intrusive and cold styles became a mediator only when some motivation variables were added to the model, implying that not only psychological problems should be included when analysis internet addiction, but also other variables such motivation for internet use. The percent of variance explained, by IAT score, increased from 13% by the mediation model to 33% by the moderated mediation model, and 43% by the serial mediation model. Conclusion The study suggested the crucial role of loneliness and interpersonal problems on internet addiction, for which motivation for the internet use explained how each interpersonal problem would be associated. This may provide some insight regarding the pathological characteristics of those using the internet as a coping strategy. Intervention to help students experiencing loneliness to avoid excessive use of the internet is possible when their interpersonal problems and various types of motivation are identified.