Items Mean (SD) / Cronbach’s \(\alpha\)
Elementary Middle High
“I feel ashamed or foolish when I talk to my friends about my problems.” (R) 4.06 (.68)
/ .70
4.06 (.66)
/ .74
4.11 (.66)
/ .75
“I wish my friends are not the current ones but others.” (R)
“I feel lonely even when I am with my friends.” (R)
“I sometimes get angry because of my friends.” (R)
“When I'm upset, my friends tend to not take it seriously.” (R)
“My friends understand me.”