Table 1.

Sources used to generate initial pool of items.

ITEMS	SOURCES
To meet new people	Jonhson & Yang (2009)
To participate in discussions
To express myself freely
To communicate more easily
To communicate with many people at the same time
To get information	Cheung, Chiu, & Lee (2011)
To negotiate or bargain
To be entertained
To impress
To let others know I care about their feelings	Y. Kim, Sohn, & Choi (2011)
To talk out my problems and get advice
To get new ideas
To learn about unknown things
To relax
To pass time
To forget about work or other things
To get what I want for less effort
To keep in touch with my family	Shi, Yue, & He (2013)
To keep in touch with my old friends
Because I think it might be helpful for my work
To record what I do in life	Alhabash & McAlister (2015)
To record what I have learned
To record where I have been
To share information
To show my personality
To tell others about myself
Because I like that I can post things I want to say immediately
To remember special events	Sheldon & Bryant (2016)
To see what other people share
To find people with whom I have common interests
To create art
To become popular
To self-promote
To find old friends	Qualitative study
To find love and/or flirt
To follow the news
To purchase online
To sell online
To build a professional network