Table 3.

Inter-rater agreements between the three topic coders measured by Cohen's Kappa. Note that coder 1 annotated all posts while coder 2 and coder 3 annotated two complimentary parts of the data. Therefore, no agreement is calculated between coder 2 and coder 3.

Label	Coder 1 and 2	Coder 1 and 3
Avg K	0.50	0.62
ALTR	0.36	0.29
DAIL	0.30	0.50
DIAG	0.50	0.71
FIND	0.56	0.61
HSYS	0.56	0.68
MISC	0.38	0.76
NUTR	0.70	0.69
PERS	0.13	0.61
RSRC	0.63	0.58
TEST	0.69	0.70
TREA	0.67	0.71