本研究在新冠肺炎疫情的背景下，通过对1561名初一-高三学生及其父母进行问卷调查，使用SPSS 20.0和Amos 23.0进行描述统计、方差分析和相关分析，并通过结构方程模型的建模，来了解疫情期间青少年及其父母的内化问题、亲子关系以及青少年手机等电子产品成瘾现状，并探究父母内化问题对青少年手机等电子产品成瘾影响的内部作用机制。研究结论如下：

1、总体而言，此次疫情对青少年及其父母的内化问题、亲子关系以及青少年手机等电子产品成瘾影响不大。

2、青少年手机等电子产品成瘾基本情况：青少年手机等电子产品成瘾在性别和家庭月收入上存在显著差异，其中男生和家庭月收入高于2万元的青少年成瘾程度更高。

3、父母内化问题基本情况：青少年父母群体的抑郁检出率为25.6%，焦虑检出率为9.9%。父母焦虑、抑郁在孩子是否为独生子女和家庭月收入上存在显著差异，其中非独生子女和家庭月收入在0.5万元以下、0.5-1万元的父母焦虑、抑郁水平更高。

4、亲子关系基本情况：总体而言，亲子冲突水平较低，亲子亲合水平较高。亲子冲突在年级上存在显著差异，初一、初二年级青少年的亲子冲突水平更高。亲子亲合在是否独生子女上存在显著差异，独生子女的亲子亲合水平更高。

5、青少年内化问题基本情况：青少年群体的抑郁检出率为53%，焦虑检出率为25.8%。青少年焦虑、抑郁在年级上存在显著差异，高中年级青少年的焦虑、抑郁水平更高。青少年抑郁在性别和家庭月收入上存在显著差异，其中女生和家庭月收入在0.5万元以下的青少年的抑郁水平要更高。

6、疫情期间在亲子关系、青少年和父母内化问题方面变得更差的青少年的手机等电子产品成瘾程度均显著高于在这些方面几乎没有变化和情况变得更好的青少年，而在这些方面与疫情前几乎没有变化的青少年成瘾程度均显著高于情况变得更好的青少年。

7、父母焦虑、父母抑郁、亲子冲突、青少年焦虑、青少年抑郁、青少年手机等电子产品成瘾两两变量之间均呈显著正相关，亲子亲合与其他变量之间均呈显著负相关。

8、父母内化问题不直接预测青少年手机等电子产品成瘾，而是通过五条中介路径：通过亲子关系的中介作用，其中亲子冲突的相对作用力比亲子亲合更大；通过青少年内化问题的中介作用；通过亲子关系和青少年内化问题的链式中介作用。

In the context of the COVID-19, a total of 1561 teenagers and their parents were surveyed and analyzed by SPSS 20.0 and Amos 23.0 to understand the current situation of teenagers’ and parental internalizing problems, parent-child relationship and teenagers’ phone and tablet addiction, and to explore the mechanism of the effect of parental internalizing problems on teenagers’ phone and tablet addiction. The conclusions were as follows:

1、In general, the new coronavirus epidemic had little effect on teenagers’ and parental internalizing problems, parent-child relationship and teenagers’ phone and tablet addiction.

2、There were significant gender, monthly family income differences in scores of teenagers’ phone and tablet addiction: the boys’ score of teenagers’ phone and tablet addiction was significantly higher than that of girls; the score of teenagers with a monthly family income of more than 20,000 yuan was significantly higher than others.

3、The prevalence rates of depression and anxiety were 25.6% and 9.9% respectively among parents. There were significant only-child, monthly family income differences in scores of parental internalizing problems: the score of parents with non-only-child was significantly higher than that of parents with only-child; the score of parents with a monthly family income of less than 5,000 yuan and 50-10,000 yuan were significantly higher than others.

4、Overall, the parent-child conflict was on the low level, the parent-child cohesion was on the high level. There were significant grade differences in scores of parent-child conflict: the parent-child conflict score of teenagers in the junior one and two were significantly higher than that of teenagers in other grades. There were significant only-child differences in scores of parent-child cohesion: the parent-child cohesion score of only-child was significantly higher than that of non-only-child.

5、The prevalence rates of depression and anxiety were 53% and 25.8% respectively among teenagers. There were significant grade differences in scores of teenagers’ internalizing problems: the score of teenagers in the senior high school was significantly higher than that of teenagers in the junior school. There were significant gender, monthly family income differences in scores of teenagers’ depression: the girls’ score of depression was significantly higher than that of boys; the score of teenagers with a monthly family income of less than 5,000 yuan was significantly higher than teenagers with a monthly family income of 50-10,000 yuan and 10,000-20,000 yuan.

6、Compared with before the epidemic, the degree of phone and tablet addiction of teenagers with higher parent-child conflict, worse parent-child cohesion, and higher levels of teenagers’ and parental internalizing problems during the epidemic were significantly higher than teenagers who had not changed or became better in these aspects. The degree of phone and tablet addiction of teenagers with not changed in these aspects were significantly higher than those who became better.

7、The relationships between each pair of the parental anxiety, parental depression, parent-child conflict, teenagers’ anxiety, teenagers’ depression, as well as teenagers’ phone and tablet addiction were significantly positive; and parent-child cohesion was negatively correlated with the other variables.

8、Parental internalizing problems did not affect teenagers’ phone and tablet addiction directly, but affected teenagers’ phone and tablet addiction through five pathways indirectly: through the mediating role of parent-child relationship, which including parent-child conflict and parent-child cohesion, and parent-child conflict had a greater relative force; through the mediating role of teenagers’ internalizing problems; through the chain mediating role of both parent-child relationship and teenagers’ internalizing problems.