Objective To explore the effect of core self-evaluations on the relationship between Internet addiction and dragging behavior among university students.Methods A questionnaire-based survey study was conducted in 1 140 university students.Internet Addiction Test（IAT）

Core Self-evaluations Scale（CSES）and Aitken procrastination inventory（API）were used in this study.The mediation effect of core self-evaluations was assessed based on Bootstrap analysis.Results The mean scores of IAT

API and CSES among these university students were 49.4±14.9

51.9±8.5 and 31.8±14.5

respectively.Correlation analysis showed that

Internet addiction was positively correlated with dragging behavior（r=0.49

P<0.01）

and core self-evaluations was negatively correlated with both Internet addiction and dragging behavior（r=-0.34 and-0.40

respectively;both P<0.01）.In multiple stepwise regression analysis

with dragging behavior as the dependent variable

both Internet addiction and core self-evaluations were included in the regression equation

and both of them had significant predictive effects on dragging behavior;Internet addiction could positively predict dragging behavior

while core self-evaluations could negatively predict dragging behavior.Results of Bootstrap analysis indicated that

core self-evaluations had a partial mediation effect on the relationship between Internet addiction and dragging behavior

accounting for 23.1% of the overall effect.Conclusion Among university students

Internet addiction not only directly affects dragging behavior

but also has an indirect effect on dragging behavior via core self-evaluations.