A case study of contributor behavior in Q&A site and tags: the importance of prominent profiles in community productivity

Journal of the Brazilian Computer Society

Table 2 Standardized centers from 15-cluster solution and a new center found in the 16-cluster solution

Centers	Answers	Questions	Comments	Activity	MUAnswers	MUQuestions	MUComments	Distribution to
				duration				the mean point
Center 1	-0.10	-0.08	-0.07	-0.15	0.14	0.69	-0.20	0.76
Center 2	-0.09	-0.20	-0.09	-0.18	0.17	-0.47	-0.20	0.62
Center 3 ^a	-0.09	0.06	-0.06	-0.10	0.19	0.01	-0.1	0.31
Center 4	-0.07	-0.28	-0.09	-0.19	-1.82	-0.44	-0.20	1.92
Center 5 ^a	0.01	0.25	0.01	0.12	-1.14	0.36	-0.02	1.23
Center 6 ^a	-0.05	-0.29	-0.09	-0.17	-0.87	-0.45	-0.20	1.06
Center 7	0.03	-0.12	0.00	0.06	0.27	-0.04	7.10	7.11
Center 8 ^a	0.12	-0.02	0.06	0.22	0.18	0.19	1.16	1.21
Center 9	0.06	0.02	0.03	0.11	0.12	9.71	0.77	9.75
Center 10 ^a	-0.07	-0.05	-0.05	-0.10	0.14	2.77	-0.05	2.77
Center 11	2.93	1.07	2.43	4.67	0.27	0.72	0.82	6.22
Center 12	23.40	5.35	24.78	22.13	0.45	1.02	0.79	41.01
Center 13 ^a	0.14	2.52	0.34	1.07	0.29	0.42	0.09	2.81
Center 15 (new in 15-cluster solution)	1.03	13.61	2.25	4.90	-0.03	0.67	0.14	14.69
Center 14	-0.06	-0.13	-0.07	-0.10	2.13	-0.11	-0.13	2.15
New center in 16-cluster solution ^a	-0.06	-0.28	-0.09	-0.17	1.71	-0.45	-0.20	1.8

Each center identified by Ward algorithm is listed in groups formed based on their similarity (Euclidian distance). ^aThe center was excluded from the final center set (initial seed for k-means). The italicized values indicate a distinct metric of the respective center.