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The purpose of this paper is to investigate the predictors of game addiction based on loneliness, motivation and inter-personal competence using the samples of college students recruited from South Korea (n=251).

The authors examined the underlying mechanism of game addiction by testing a moderated mediation model, in which inter-personal competence moderated the mediation model of loneliness, regulatory focus and online game addiction. First, the authors clarified the relationship among loneliness, motivation and inter-personal competence, to understand the influences of loneliness on other variables in this study (mediation test). Second, the authors examined the underlying mechanism of game addiction by testing a moderated mediation model, in which inter-personal competence moderated the mediation model of loneliness, regulatory focus and online game addiction (moderated mediation).

Regulatory focus mediated the effect of loneliness on online game addiction. Moderated mediation analyses using PROCESS confirmed that inter-personal competence significantly buffered the indirect effect of loneliness (through regulatory focus) on online game addiction. The findings indicated that inter-personal competence accounted for significant differences in the mediation models.

This study bridges the gap in the online game addiction literature by explaining how loneliness is associated with online game addiction.

Gut microbial changes are associated with diseases such as obesity and type 2 diabetes and may be influenced by diet patterns. Thus, this paper aims to investigate the effects of alcohol, sodium chloride (NaCl) and dietary restriction on the composition of the gut microflora.

Five-week-old male C57BL/6N mice were orally administered by gavage with ethanol (ET; 4 g/kg), 200 µL of 6% NaCl (NC), or equivalent volumes of phosphate-buffered saline (ET-control and NC-control) every two days for 10 weeks. The mice were also orally administered by gavage with the recommended diet (RD-control; 3 g per mouse per day), or with 40% (RD-40) or 60% restricted level (RD-60). DNA samples obtained from mice ceca were sequenced using the Illumina MiSeq Sequencing system; raw data were analyzed using BIOiPLUG software.

This study shows that high ethanol and NaCl consumption, and diet restriction can change the composition of the intestinal microflora, especially Akkermansia muciniphila in ET (p = 0.0050) and NT (p = 0.0366) groups. In addition, the ratio of Bacteriodetes/Firmicutes and the diversity of microflora were generally reduced (p = 0.0487-0.4929).

These results raise the possibility of a relationship between diet patterns, change of intestinal microbiome and disease, which must be further evaluated.