Table 2. Exploratory factor analyses item loadings (Varimax rotation) (N Training = 824).

No.	Item	Factor1 Show approval	Factor2 Argue	Factor 3 Gain attention	Factor 4 Entertain
1.	To show that I saw the tweet
2.	To make more people see the tweet
3.	To Spread knowledge
4.	To entertain				0.88
5.	To share a funny joke				0.90
6.	To make my own twitter feed look good
7.	To add my thoughts to a tweet		0.70
8.	To get my followers to join the discussion
9.	To say that I agree with the tweet
10.	To argue against a tweet that I disagree with		0.72
11.	To introduce my followers to the tweeter	0.70
12.	To show my support for the tweeter	0.77
13.	To show my followers that I like the tweeter	0.73
14.	To show my followers how I feel about an issue
15.	To tell my followers about an event
16.	To gain new followers			0.74
17.	To get someone's attentions			0.71
18.	To save tweets so I can find them again
19.	Because I trust the tweeter

Exploratory Factory Analysis resulted in 4 interpretable factors. Colored cells indicate factor loadings ≥ 0.7 for the corresponding items (Column 1).