Summary of survey scores (median of Likert score was subtracted)
Question	mean	Sum of positives (Ps)	Sum of negatives (Ns)	(Ps-Ns)/(Ps+Ns)	Count of positives (Pc)	Count of negatives (Nc)	(Pc-Nc)/(Pc+Nc)
1	0.45	141	41	0.55	120	39	0.51
2	0.68	176	26	0.74	146	24	0.72
3	0.58	167	38	0.63	136	34	0.6
4	0.47	144	39	0.57	125	36	0.55
5	0.76	191	22	0.79	154	20	0.77
6	0.74	194	30	0.73	156	25	0.72
7	0.7	183	28	0.73	147	28	0.68
8	0.98	235	18	0.86	177	15	0.84
9	-0.11	64	88	-0.16	58	73	-0.11
10	0.83	205	20	0.82	158	20	0.78
11	-0.37	68	151	-0.38	53	109	-0.35
12	0.91	219	17	0.86	171	15	0.84
13	1.15	289	34	0.79	187	29	0.73
14	0.5	148	38	0.59	117	35	0.54
15	0.22	90	42	0.36	80	38	0.36
16	-0.59	38	170	-0.63	34	130	-0.59
17	0.41	128	38	0.54	109	36	0.5
18	0.53	156	38	0.61	131	32	0.61
19	0.52	145	30	0.66	124	29	0.62
20	-0.17	75	113	-0.2	68	89	-0.13

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.968 (0)	0.968 (0)
(Ps-Ns)/(Ps+Ns)	0.968 (0)	1 (0)	0.999 (0)
(Pc-Nc)/(Pc+Nc)	0.968 (0)	0.999 (0)	1 (0)

Kendall tau rank correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.918 (0)	0.899 (0)
(Ps-Ns)/(Ps+Ns)	0.918 (0)	1 (0)	0.971 (0)
(Pc-Nc)/(Pc+Nc)	0.899 (0)	0.971 (0)	1 (0)