Abstract
Abstract
This 6 month prospective study systematically tested some multivariate models that advanced the understanding of the psychological mechanisms underlying Internet addiction and psychosocial maladjustment. On the basis of previous theories, avoidant coping and coping inflexibility were proposed as underlying mechanisms. Participants were 271 Chinese undergraduates (75% women, Mage=20.49) who took part in both phases of this study. Structural equation modeling was performed to obtain the best fit models for both the cross-sectional and the prospective data. The cross-sectional model testing revealed statistically significant mediating effects for both avoidant coping (β=0.149 [95% CI 0.071–0.226], p=0.002) and coping flexibility (β=0.048 [95% CI 0.013–0.081], p=0.032). The prospective model testing further showed that avoidant coping mediated the relationship between Internet addiction and Time 2 psychosocial maladjustment (β=0.141 [95% CI 0.065–0.216], p=0.005), as well as that between coping flexibility and Time 2 psychosocial maladjustment (β=−0.096 [95% CI −0.161 to −0.031], p=0.015). This study was the first to establish theory-driven models, which unveiled an inflexible, avoidant coping style as psychological mechanisms that explained the link between Internet addiction and psychosocial maladjustment.
Introduction
P
Internet addiction and psychosocial maladjustment
A meta-analysis has indicated that Internet addiction is related to emotional disorders including depression and anxiety.
6
Apart from emotional problems, individuals with Internet addiction also frequently encounter interpersonal problems.
7
The rich-get-richer hypothesis states that online communication may benefit extroverts who are endowed with abundant offline social resources.
8
Such psychological benefits, however, are absent for introverts because Internet use results in the allocation of inadequate time for social interactions,
9
thus shrinking their already scarce social resources. As individuals with Internet addiction were found to report lower levels of extraversion,
10
their excessive Internet use may reduce opportunities to polish their inadequate social skills in the real-life social milieu, thus increasing their susceptibility to social maladjustment. The following hypothesis was tested:
Mediating role of avoidant coping
Studies have revealed that individuals with Internet addiction report higher levels of stress than their counterparts without this addictive problem.11,12 According to the transactional theory of coping,
13
some individuals who consider the event a challenge tend to confront and tackle the problem directly (i.e., approach coping), whereas those who consider the same event an uncontrollable threat tend to refrain from facing it (i.e., avoidant coping). It was predicted that individuals with Internet addiction are characterized by an avoidant coping style. This notion stems from studies revealing that these individuals tend to be more dissatisfied with their real life,
2
and that they may have a greater tendency to escape from the self, which unveils one's wish to avoid pondering the painful past and to engage in distracting tasks.
14
Unlike the real world, everything in the virtual world seems alterable and controllable,
15
and individuals with Internet addiction may rely more on online activities to get away from their real-life stress.
16
Taken together, it was predicted that these individuals tend to use avoidant coping more than those without Internet addiction. The following hypothesis was therefore tested:
Transactional theory states that adaptive coping strategies should be distinguished from maladaptive ones. Approach coping strategies (e.g., active coping, planning) are generally deemed adaptive in tackling the problems directly, thus fostering psychosocial adjustment.
17
In contrast, avoidant coping strategies (e.g., denial, self-blame) are generally considered maladaptive because the problems remain intact rather than disappearing, thus eliciting psychosocial maladjustment in the long run.
18
In light of previous findings that revealed the mediating effects of coping between addictive behaviors (e.g., alcohol use) and social anxiety among university students,
19
it was predicted that greater use of avoidant coping may account for the link between Internet addiction and psychosocial maladjustment. The following hypotheses were tested:
Mediating role of coping inflexibility
Transactional theory also states that coping represents an ongoing evolving process. Flexible deployment of coping strategies is thus essential for adjustment to the ever-changing environment. Coping flexibility (vs. inflexibility) refers to the capability of modifying one's strategies to meet specific situational demands.
20
It was predicted that individuals may display coping inflexibility, as indicated by consistent deployment of avoidant coping across situations. This prediction stems from recent neurobiological evidence, which reveals that individuals with Internet addiction have impaired decision making abilities.
21
Such an impairment interferes with their processing of feedback-related information and judgment of the appropriateness of their responses, both of which are cognitive mechanisms essential for flexible coping to take place.
22
It is thus reasonable to infer an inverse link between Internet addiction and coping flexibility, and excessive Internet use may imply a manifestation of inflexible deployment of avoidant coping regardless of situational characteristics. The following hypotheses were tested:
Individuals with Internet addiction may keep engaging in online activities despite encountering devastating consequences of their online behaviors.
21
Such inflexibility is maladaptive due to an incapability of detecting the contingency between their behaviors and event outcomes.
23
According to the theory of learned helplessness,
24
such a perception of lacking control over the situation hinders attempts to adapt to the changing environment, and ultimately induces a state of learned helplessness and depression. In the coping literature, results provide support for the beneficial role of coping flexibility by indicating that individuals who display greater flexibility generally experience higher levels of psychosocial well-being, whereas those who are less flexible generally encounter more psychosocial problems.25,26 In this light, it was predicted that coping inflexibility may account for the relationship between Internet addiction and psychosocial maladjustment. The following hypotheses were tested:
In summary, a set of hypotheses was derived from previous theories and findings. Several multivariate models were constructed to test these hypotheses, specifically the proposed mediating roles of avoidant coping and coping flexibility between Internet addiction and psychosocial maladjustment. Structural equation modeling was performed to obtain the best fit models for both the cross-sectional and prospective data.
Method
Research design
This study contained two phases conducted 6 months apart. Adopting a prospective design, all the psychosocial variables were assessed in the initial phase, but only the criterion variables were assessed in the follow-up phase.
Participants
A total of 294 Chinese undergraduates voluntarily took part in both phases. After discarding the data with missing or incorrect identity codes, the final sample comprised 271 Chinese participants (59 men, 204 women, 8 did not specify), with an average age of 20.49 years (SD=1.22 years). Participants who completed both phases and those who dropped out did not differ in any Time 1 measures.
Procedures
This study obtained prior ethical approval from the university's Institutional Review Board. Participants had to sign a consent form before filling out a set of questionnaires (see below). In the follow-up session, those who indicated interest received the questionnaires. All the participants were thanked and debriefed at the end of the study.
Measures
Internet addiction was assessed by two popular instruments: the Internet Addiction Test and the Online Cognition Scale.27,28 The latter examined four types of cognition regarding Internet addiction: emotional discomfort, diminished impulse control, distraction, and social comfort (reverse scored).
Avoidant coping style was assessed by four subscales of the Brief COPE: denial, substance use, behavioral disengagement, and self-blame. 29 The Coping Flexibility Scale was employed to measure two coping flexibility processes: evaluation and adaptation. 30
To assess psychosocial maladjustment, three common criterion measures were included: Emotional and Social Loneliness Scale, negative affect subscale of the Positive Affect and Negative Affect Schedule, and Interaction Anxiousness Scale.31–33
All the measures were in Chinese, the native language of the participants. These measures were validated in Chinese samples and were found to display good psychometric properties.34,35
Results
A priori statistical analysis plan
To test the proposed models, structural equation modeling (SEM) was performed using SPSS Statistics for Windows v19.0 (IBM Corp., Armonk, NY) and MPlus 6.0. We evaluated the level of overall data fit of each tested model using the following fit indices 36 : comparative fit index (CFI), root mean square error of approximation (RMSEA), standardized root mean square residual (SRMR), and Tucker–Lewis index (TLI).
The candidate models were then compared using the Akaike information criterion (AIC) and Bayesian information criterion (BIC). According to the general rule of thumb, the preferred model would be the one with the lowest AIC and BIC values. 37 A more robust test of the mediating effects of the preferred model was carried out using the bootstrap estimation procedures, which involved repeated sampling of the dataset and estimating the indirect effect in each resampled dataset. 38 The indirect effect was significant at the 0.05 level if the 95% confidence intervals (CI) for the average estimates excluded zero. 39
Cross-sectional model testing
Before performing cross-sectional model testing, the study first examined whether there were sex differences. The preliminary analyses revealed no overall sex differences, and thus all the analyses were performed based on the pooled sample. Table 1 presents the descriptive statistics of the study variables.
Figure 1 depicts the standardized parameters of all the cross-sectional models, and Table 2 presents the fit indices of each of these models. The upper panel of Table 2 shows that Models 1 and 2 both had a good fit of the baseline data. However, the models significantly differed from each other (Δχ 2 [1]=22.90, p<0.01; AIC difference=20.90, BIC difference=16.67), indicating that the additional path from Internet addiction to Time 1 psychosocial maladjustment had a considerable contribution to the explanatory power of Model 2 (see Fig. 1b).

Results from cross-sectional model testing.
df, degrees of freedom; CFI, comparative fit index; TLI, Tucker–Lewis index; RMSEA, root mean square error of approximation; SRMR, standardized root mean square residual; AIC, Akaike information criterion; BIC, Bayesian information criterion.
The study further examined Model 3 that contained an additional path from coping flexibility to avoidant coping (see Fig. 1c). Results showed that this additional path was statistically significant (β=−0.24, p=0.002), and this model also showed a good data fit (see the upper panel of Table 2). When Model 3 with Model 2 were compared, the additional path substantially contributed to the explanatory power of Model 3 (Δχ 2 [1]=10.93, p<0.01; AIC difference=8.93, BIC difference=4.71). Model 3 was the preferred cross-sectional model due to its smallest AIC and BIC values.
The statistically significant mediating effects of avoidant coping and coping flexibility identified in Model 3 were then tested using the bootstrap estimation procedures. As shown in the upper panel of Table 3, Internet addiction was significantly related to Time 1 psychosocial maladjustment. Moreover, both avoidant coping and coping flexibility were significant mediators, with statistically significant effects comprising (a) the mediating role of avoidant coping between Internet addiction and Time 1 psychosocial maladjustment; (b) the mediating role of coping flexibility between Internet addiction and Time 1 psychosocial maladjustment; and (c) the mediating role of avoidant coping between coping flexibility and Time 1 psychosocial maladjustment.
p<0.05; **p<0.01.
CI, confidence intervals; IA, Internet addiction; PM-T1, psychosocial maladjustment assessed at Time 1; AC, avoidant coping; CF, coping flexibility; PM-T2, psychosocial maladjustment assessed at Time 2.
Prospective model testing
A prospective model (Model 4) was constructed based on the preferred model (Model 3) obtained from the cross-sectional analyses. As shown in Figure 2a, the results indicated that the path from Internet addiction to Time 2 psychosocial maladjustment, as well as that from coping flexibility to Time 2 psychosocial maladjustment, were not statistically significant.

Results from prospective model testing.
Then another model (Model 5) was built by omitting these two nonsignificant paths (see Fig. 2b). Although the two models similarly showed a good data fit (see the lower panel of Table 2), Model 5 had a slight improvement over Model 4 (AIC difference=−0.62, BIC difference=−9.36), as indicated by smaller AIC and BIC values. Model 5 was the preferred prospective model because it was more parsimonious with all the nonsignificant paths removed.
The lower panel of Table 3 displays the indirect effects and their respective 95% CI for Model 5. Results from the bootstrap estimation procedures revealed that the mediating effect of avoidant coping between Internet addiction and Time 2 psychosocial maladjustment was statistically significant. In addition, the indirect effect of avoidant coping between coping flexibility and Time 2 psychosocial maladjustment was also statistically significant.
Discussion
The present study is the first to explain the intricate relationships between Internet addiction and psychosocial maladjustment using both cross-sectional and prospective model testing. New findings indicate that individuals with Internet addiction are characterized by a maladaptive coping style that comprises both avoidant coping and coping inflexibility. First, the positive link between Internet addiction and avoidant coping indicates that Chinese young adults with Internet addiction may have a greater propensity to handle stress using avoidant coping. More important, avoidant coping is a psychological mechanism that explains the link between Internet addiction and psychosocial maladjustment. These findings imply that individuals with Internet addiction are more likely to find ways to escape from real-life difficulties rather than to handle stress actively.
The new findings also indicate that inflexible coping style is another mediator that accounts for the link between Internet addiction and psychosocial maladjustment. From a biological perspective, the greater tendency to cope inflexibly with environmental changes may be related to the greater brain activation in bilateral precuneus among individuals with Internet addiction. 40 Taken together, the inverse link between avoidant coping and coping flexibility indicates that individuals with Internet addiction are characterized by an inflexible, avoidant coping style. The psychosocial maladjustment among individuals with Internet addiction can be explained by their deployment of avoidant coping regardless of the characteristics of stressful events. Such an inflexible, avoidant coping style bears some resemblance to learned helplessness, a psychological condition in which individuals perceive having no control over their environment due to prolonged repeated exposure to aversive events. 41 Hence, the present results provide evidence that the classic theory of learned helplessness, 24 formulated a few decades ago, may also be applicable to explicate the contemporary problem of Internet addiction.
Results from the prospective model testing document that only avoidant coping, but not coping inflexibility, can explain the link between Internet addiction and subsequent psychosocial maladjustment. Results further show that avoidant coping also accounts for the link between coping inflexibility and subsequent psychosocial maladjustment. These findings suggest that coping inflexibility per se cannot account for the maladaptive aspect of Internet addiction, and coping inflexibility predicts subsequent psychosocial maladjustment due to the deployment of avoidant coping. Such results are consistent with theories of coping flexibility, 20 which distinguishes two types of coping inflexibility: (a) active inflexible coping, which refers to the indiscriminant use of approach coping regardless of situational demands, and (b) passive inflexible coping, which refers to the indiscriminant use of avoidant coping regardless of situational demands. Previous studies have indicated that active and passive inflexible coping are related to dissimilar psychosocial outcomes, with more desirable outcomes associated with an active inflexible coping style and more undesirable ones associated with a passive inflexible coping style.42,43 In line with these findings, the prospective findings of the current study specify that individuals with Internet addiction are characterized by a passive (avoidant) inflexible coping style but not an active inflexible one.
The present findings may have practical implications for mental health professionals working with clients with Internet addiction. Specifically, these new findings demonstrate that strengthening flexible coping—through reducing avoidant coping and enhancing approach coping—may foster psychosocial adjustment among this group of clients. Before delivering training sessions to achieve these overarching goals, practitioners should enhance the clients' awareness of their inflexible, avoidant coping style and its maladaptiveness in preventing them from facing real-life stressful events. Given that all coping strategies have their unique goals and characteristics,44,45 the clients should then learn to distinguish the specific characteristics of an array of stressful events and to deploy situation-appropriate coping strategies to meet the specific demands of diverse stressful situations. 46
There are, however, some limitations of this study. This study only recruited young adults because individuals from this age cohort are the most vulnerable to Internet addiction, 47 and many of the participants were residing in urban cities. Previous findings have revealed differences in the susceptibility to Internet addiction between rural and urban youngsters, 48 and further studies should evaluate the generalization of the present findings to samples with distinct demographic characteristics such as adults from rural areas and hard-to-reach hidden youth. 49 Also, other addictive behaviors that are usually clustered with Internet addiction, such as smoking and compulsive overeating, were not studied here. These addictive behaviors together with Internet addiction may have conjoint effects on psychosocial maladjustment. Last but not least, this study examined psychosocial maladjustment as a criterion, but it is equally possible that it is an antecedent that leads to Internet addiction. Future studies should test the feasibility of this alternative model.
Despite such limitations, this study contributes to the literature by being the first to examine some psychological mechanisms, which explain the role of avoidant coping style and coping flexibility in accounting for the relationship between Internet addiction and psychosocial maladjustment. Unlike the scattered results in the coping literature, the present study examined both coping style and process in a more comprehensive manner. More important, it is also the first attempt to adopt both a cross-sectional and a prospective design that systematically test several candidate multivariate models, thus providing a useful theoretical framework that may lay a foundation for designing intervention programs to treat Internet addiction. The different patterns of findings yielded by the cross-sectional and prospective model testing provide further support for the value of adopting more than one time point in Internet addiction research.
Footnotes
Acknowledgments
Preparation of this manuscript was supported by the Hong Kong Research Grants Council's General Research Fund (17400714) and Seed Funding Program for Basic Research (201411159152) to Cecilia Cheng; and the National Social Science Foundation of China Research Grant (15CSH052) and Priority Academic Program Development of Jiangsu Higher Education Institutions to Peizhen Sun.
Author Disclosure Statement
No competing financial interests exist.
