Attention allows us to select relevant information from the background. Although several studies have described that cannabis use induces deleterious effects on attention, it remains unclear if cannabis dependence affects the attention network systems differently.Objectives:To evaluate whether customary consumption of cannabis or cannabis dependence impacts the alerting, orienting, and executive control systems in young adults; to find out whether it is related to tobacco or alcohol dependence and if cannabis use characteristics are associated with the attention network systems.Method:One-hundred and fifty-four healthy adults and 102 cannabis users performed the Attention Network Test (ANT) to evaluate the alerting, orienting, and executive control systems.Results:Cannabis use enhanced the alerting system but decreased the orienting system. Moreover, those effects seem to be associated with cannabis dependence. Out of all the cannabis-using variables, only the age of onset of cannabis use significantly predicted the efficiency of the orienting and executive control systems.Conclusion:Cannabis dependence favors tonic alertness but reduces selective attention ability; earlier use of cannabis worsens the efficiency of selective attention and resolution of conflicts.

中文翻译：

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大麻依赖改变了注意力的警报和定向系统

注意力允许我们从背景中选择相关信息。尽管几项研究描述了大麻的使用会对注意力产生有害影响，但尚不清楚大麻依赖是否会以不同的方式影响注意力网络系统。目标：评估大麻的习惯消费或大麻依赖是否会影响年轻人的警觉、定向和执行控制系统；了解它是否与烟草或酒精依赖有关，以及大麻使用特征是否与注意力网络系统相关。方法：154 名健康成年人和 102 名大麻使用者进行了注意力网络测试 (ANT)，以评估警报、定向和执行控制系统。结果：大麻的使用增强了警报系统，但降低了定向系统。此外，这些影响似乎与大麻依赖有关。在所有使用大麻的变量中，只有开始使用大麻的年龄显着预测了定向和执行控制系统的效率。结论：大麻依赖有利于增强警觉性，但会降低选择性注意能力；过早使用大麻会降低选择性关注和解决冲突的效率。