표 5 국외 연구의 모델별 Silhouette 계수

Type	model #	TF-IDF	Topic	α	β	Silhouette
Word	3	0.1	4	0.2	0.01	0.742
Word	7	0.1	5	0.2	0.01	0.708
Word	11	0.1	6	0.2	0.01	0.727
Word	15	0.1	7	0.2	0.01	0.660