本研究從青少年所遭逢的社會環境因素（生活壓力）與個人心理因素（自我控制）來探討其與網路沉迷傾向間的關係，並探討不同背景變項的國中生在網路沉迷傾向上的差異、網路沉迷高危險群的分類及不同網路沉迷類型者之差異性。本研究以2,056位國中生為研究樣本，研究發現：一、國中生的網路沉迷因「性別」與「網路使用活動」之不同而有所差異；二、網路沉迷傾向高危險群分成四群，分別為「男生長時間網路遊戲高危險群」、「女生聊天、遊戲、娛樂高危險群」、「即時通高危險群」及「短時間網路遊戲高危險群」；三、不同程度的生活壓力和不同程度的自我控制國中生在網路沉迷傾向各分量表上沒有交互作用存在，但生活壓力與自我控制主要效果達顯著；四、生活壓力的五個X變項（身心發展、學校課業、人際交往、家庭生活壓力與未來發展壓力）透過第一組典型因素可解釋所有網路沉迷傾向的四個Y變項的12.46%；五、自我控制的四個X變項（求樂衝動性、低計畫性、情緒衝動、刺激尋求）透過第一組典型因素可解釋所有網路沉迷傾向的四個Y變項的19.73%；六、「性別」、「生活壓力」與「自我控制」共可聯合預測「網路沉迷傾向」38%的變異量。且「自我控制」在「性別」、「生活壓力」與依變項（網路沉迷傾向）間之關係具有部分中介效果。

This study explores the relationships among social environment (life stress), individual psychological factors (self-control), and Internet addiction among senior high school students. We explore the prevalence of Internet addiction among junior high school students from different backgrounds, and divide high-risk students into groups to explore differences. The research samples were 2,056 junior high students in Hsinchu City. The research results are described as follows: (1) Signifi cant differences were found in the variables of gender and online activity for Internet addiction; (2) The high-risk Internet addiction tendency group was divided into 4 categories, including “the high risk of boys for online games,” “the high risk of girls for chatting, games, and entertainment,” “the high risk of MSN messages,” and “the high risk of short-term online games”; (3) No interaction effect between life stress and self-control was found in the Internet addiction of junior high school students, but life stress and self-control in Internet addiction were found to exist; (4) All life stress variables explained 12.46% of Internet addiction; (5) All self-control variables explained 19.73% of Internet addiction; and (6) Gender, life stress, and self-control could be effectively used to predict 38.1% of Internet addiction. Self-control had a partial relationship to gender, life stress, and Internet addiction.