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Table 2 Reliability analysis results of each item

From: The impact of sharing physical activity experience on social network sites on residents’ social connectedness:a cross-sectional survey during COVID-19 social quarantine

  Mean SD CITC α AVE CR
Sharing physical activity experiences 3.60 0.79   0.79 0.50 0.81
 Every time I do physical activity, I share photos. 3.66 1.00 0.84**    
 Every time I do physical activity, I share videos. 3.29 1.09 0.85**    
 Every time I do physical activity, I share Wechat moments, Weibo, QQ space, etc. 3.39 1.07 0.84**    
 Every time I do physical activity, I share my feeling on Keep, HotBody, FitTime Instant Exercise, Fittime Ruijian Times or other websites. 4.05 0.88 0.59**    
Social connectedness 2.36 0.74   0.92 0.60 0.92
 I feel disconnected from the world around me. 2.32 0.93 0.80**    
 Even around people I know, I don’t feel that i really belong. 2.42 0.93 0.82**    
 I feel so distant from people. 2.37 0.93 0.81**    
 I have no sense of togetherness with my peers. 2.37 0.98 0.82**    
 I don’t feel related to anyone. 2.32 0.90 0.82**    
 I catch myself losing all sense of connectedness with society. 2.33 0.93 0.81**    
 Even among my friends, there is no sense of brother/sisterhood. 2.34 0.89 0.81**    
 I don’t feel I participate with anyone or any group. 2.39 0.87 0.78**    
Positive self-presentation 3.65 0.74   0.88 0.55 0.88
 I post photos that only show the active and healthy side of me. 3.72 0.93 0.81**    
 I selectively post photos in which I do physical activity. 3.68 0.92 0.78**    
 I only write messages that portray my health and pleasure regardless of my actual feelings. 3.54 0.97 0.77**    
 I use smiling emoticons (i.e., smiley: ☺) a lot in the messages related to physical activity I write regardless of my actual feelings. 3.60 0.95 0.81**    
 I avoid writing about negative things that happen to me when I update my status related to physical activity. 3.68 0.93 0.79**    
 When I update my status related to physical activity, I only reveal positive feelings. 3.71 0.89 0.79**    
Positive feedback 3.67 0.77   0.88 0.60 0.88
 Every time I share photos about physical activity on SNS, many friends will give good replies, such as: really beautiful, really handsome, really healthy, awesome, etc. 3.70 0.93 0.84**    
 Every time I post an idea about physical activity on SNS, I get replies from many friends. 3.58 0.94 0.81**    
 When I post some physical activity on SNS that makes me proud or happy (such as body shape, competition results), many friends will give blessings through reply 3.72 0.93 0.82**    
 Every time I post some physical activity on SNS, I encounter something interesting or funny, and many friends will reply to express their interest. 3.63 0.94 0.83**    
 Every time I ask a question about physical activity on SNS, many friends will answer my question through reply, expressing their concern for me. 3.71 0.91 0.83**    
  1. Note: ** indicates that the correlation is significant on the 0.01 level. SD standard deviation, CITC item-total correlation, α Cronbach’s alpha value, AVE average variance extracted, CR composite reliability of each construct, in which the reverse question has been re-scored