Table 2.

Items and reliability and validity of the scale.

Variable	Code	Measuring project	Cronbach's Alpha	KMO
Negative comparison	A1	My life is not as exciting as others	0.741	0.750
	A2	Seeing other people's lives increases my anxiety
	A3	Compared to others, I feel that I am not capable
Dysfunctional interaction	B1	Most of my social media chats are not for small talk, but for business or other trifles	0.718	0.709
	B2	My friends seldom take the initiative to chat with me every day
	B3	I spend a lot of time on social media every day
	B4	I think it's very difficult to control how much time you use social media
	B5	The overuse of WeChat has affected my normal life, work and study
Information overload	C1	I'm overwhelmed by the amount of information on social media	0.833	0.713
	C2	Social media is full of useless advertising information
	C3	Useless information on social media often drowns out important information
Social overload	D1	I'm very concerned about what's going on in other people's social media	0.804	0.819
	D2	I often keep in touch with others through social media interaction
	D3	I often express my concern for others by way of likes and comments
Self-efficacy	E1	I have some expertise information and experience information to share with others in social media	0.841	0.801
	E2	I can view other people's news in social media smoothly, and can comment, reply, forward, like, add or delete comments smoothly
	E3	I'm sure I can provide valuable information to other people in social media
Privacy anxiety	F1	I care about my privacy on social media	0.807	0.784
	F2	My personal information is easy to use by advertisers and other marketing personnel
	F3	I've disclosed a lot of personal privacy information on social media
Impression management	G1	The content I post on social media is generally positive, healthy and positive	0.753	0.837
	G2	I will carefully select the photos that I am satisfied with and upload them to social media
	G3	When I make a speech, I think about my own language in time to avoid hurting others
Intergenerational Communication	H1	My parents usually don't understand me	0.746	0.713
	H2	My elders and I have a big difference in our thinking
	H3	I don't want my elders to see my social media status
	H4	There is conflict between my parents and me
	H5	My parents interfere with my friendships and social activities
Social media fatigue behavior	I1	I don't use social media to actively chat with others now	0.812	0.705
	I2	Now I have less dynamic comments and praise for others
	I3	Now my WeChat chat with my friends has become simpler and less in-depth
	I4	I will often cancel the official account or the push of the screen
	I5	I don't want to experience the new features of social media anymore
	I6	I'm going to cancel my current social account
	I7	I want to go back to the simple and traditional way of social communication (making phone calls, meeting and chatting, etc.)