青少年网络成瘾者奖赏寻求与认知控制的神经机制研究

项目名称： 青少年网络成瘾者奖赏寻求与认知控制的神经机制研究

项目编号： No.31200782

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 发展心理学

项目作者： 李琦

作者单位： 中国科学院心理研究所

项目金额： 25万元

中文摘要： 青少年是网络成瘾的高发人群，揭示其网络成瘾的原因是关系青少年健康成长的重要问题。青少年大脑发展的神经生物模型指出，脑内奖赏系统和认知控制系统发展不均衡可能是青少年成瘾行为的高风险因素，但该模型尚缺乏青少年网络成瘾神经机制的实证支持。本项目从"问卷-行为实验-脑电-脑功能成像-脑结构成像"五种手段探索这一问题。首先，对青少年进行问卷调查，确定网络成瘾、奖赏寻求、认知控制三者之间的关系。随后，采用奖赏寻求（决策效用任务）和认知控制（Stroop任务）范式进行行为、脑电和脑功能成像实验，揭示青少年网络成瘾者奖赏寻求系统和认知控制系统功能发展的不平衡。最后，采用以体素为基础的形态学研究，揭示青少年网络成瘾者奖赏中枢和控制中枢结构发展的不平衡。本项目有助于从神经机制的角度揭示青少年网络成瘾的原因，加深对青少年网络成瘾本质的理解，为青少年网络成瘾的预防和干预提供新的视角和依据。

中文关键词： 青少年；网络成瘾；奖赏寻求；认知控制；神经机制

英文摘要： Adolescents are at high-risk of internet addition (IA). It is important to understand the psychopathology of IA in order to reduce its serious impact on healthy development of adolescents. One of the neurobiological models of brain development in adolescence hypothesizes that there exists an imbalance in developmental trajectory between the reward system and control system: higher development in reward system overpowers the less matured control system, which may form a risk factor in addictive behaviors during adolescence. Few empirical studies systematically examined this hypothesis in terms of IA in adolescents. In the current project, we propose to carry out a series of studies combining techniques ranging from questionnaires, behavioral testing, electrophysiology, functional and structural brain imaging to test the above hypothesis. Firstly, questionnaire assessments are used to examine the relationships among internet addiction, reward seeking and impulse control in adolescents. Next, the imbalance between reward seeking (the decision utility task) and cognitive control (Stroop task) systems will be explored with behavioral testing, event-related potentials (ERP) and functional magnetic resonance imaging (fMRI) technology. Finally, using voxel-based morphometry analysis, we examine whether the behavioral an

英文关键词： Adolescent；Internet addiction；Reward seeking；Cognitive control；Neural mechanism