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目的:探究行为抑制激活系统对大学生网络成瘾行为的影响，考察社会支持的调节作用。方法:2019年5～6月，采用大学生网络成瘾问卷，社会支持评定量表，行为抑制激活量表，对天津市630名大学生进行问卷调查。采用SPSS 24.0以及PROCESS宏程序对数据进行分析，并进行调节效应检验。结果:(1)大学生网络成瘾[(2.73±0.63)分]与社会支持各个维度均呈负相关[客观支持：(11.06±4.19)分，n r＝-0.35，n P<0.01;主观支持：(22.14±4.26)分，n r＝-0.25，n P<0.01；支持利用度：(8.22±2.26)分，n r＝-0.33，n P<0.01]，与行为抑制[(2.58±0.53)分]和激活系统[(2.55±0.43)分]呈显著正相关(n r＝0.63，0.53，均n P<0.01)。行为抑制激活系统正向预测大学生的网络成瘾行为(n β＝0.48，0.17，n P<0.01)。(2)社会支持的三个维度在行为抑制系统、行为激活系统和大学生网络成瘾问题之间起调节作用(n β＝0.08～0.16，均n P<0.05)，其中客观支持的调节作用最大，支持利用度次之。n 结论:行为抑制激活系统对大学生的网络成瘾行为具有重要的影响，而社会支持在其中起到了十分重要的调节作用。“,”Objective:To explore the effect of behavioral inhibition/activation system on internet addiction among college students, and to investigate the moderating role of social support.Method:From May to June in 2019, a questionnaire survey was conducted on 630 college students in Tianjin by internet addiction questionnaire, social support rating scale and behavioral inhibition activation scale.SPSS 24.0 and PROCESS macro program were used to analyze the data and check the moderating effect.Results:(1)The score of internet addiction scale for college students(2.73±0.63) was negatively correlated with the scores of all dimensions of social support(objective support: 11.06±4.19, n r=-0.35, n P<0.01; subjective support: 22.14±4.26,n r=-0.25, n P<0.01; degree of support utilization: 8.22±2.26,n r=-0.33, n P<0.01), positively correlated with the behavioral inhibition(2.58±0.53,n r=0.63, n P<0.01) and activition system(2.55±0.43,n r=0.53, n P<0.01). The behavior inhibition/activation system positivly predicted Internet addiction behavior(n β=0.48, 0.17, both n P<0.01). (2)The three dimensions of social support played a moderating role between behavioral inhibition system, behavioral activation system and college students' Internet addiction problem(n β=0.08-0.16, all n P<0.05). Among them, the objective support had the greatest regulatory effect, and the degree of support utilization was the second.n Conclusion:The behavior inhibition/activation system has an important influence on the Internet addiction behavior of college students, and social support plays a very important moderating role.