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	0.7	352	121	0.49	208	71	0.49
2	1.16	421	37	0.84	247	30	0.78
3	1.7	593	36	0.89	281	22	0.85
4	0.09	193	164	0.08	126	100	0.12
5	-2.23	34	763	-0.91	21	291	-0.87
6	0.33	230	123	0.3	154	80	0.32
7	1.6	560	32	0.89	275	18	0.88
8	1.73	595	34	0.89	284	17	0.89
9	0.89	349	61	0.7	206	44	0.65
10	1.81	611	22	0.93	290	13	0.91
11	-0.17	146	201	-0.16	104	128	-0.1
12	-1.94	45	679	-0.88	30	271	-0.8
13	0.74	312	73	0.62	201	48	0.61
14	0.4	268	139	0.32	163	82	0.33
15	1.51	532	39	0.86	266	25	0.83
16	1.11	413	50	0.78	237	34	0.75
17	1.43	499	30	0.89	263	19	0.87
18	-0.41	113	247	-0.37	75	149	-0.33
19	-2.32	25	780	-0.94	16	286	-0.89
20	0.72	312	75	0.61	201	50	0.6
21	0.78	350	97	0.57	205	62	0.54
22	1.58	550	37	0.87	273	22	0.85
23	1.43	490	21	0.92	271	16	0.89
24	1.69	576	25	0.92	284	15	0.9
25	0.04	182	169	0.04	123	99	0.11
26	-2.4	26	807	-0.94	17	296	-0.89
27	0.82	325	60	0.69	197	42	0.65
28	1.43	508	40	0.85	257	24	0.83

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.986 (0)	0.989 (0)
(Ps-Ns)/(Ps+Ns)	0.986 (0)	1 (0)	0.999 (0)
(Pc-Nc)/(Pc+Nc)	0.989 (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)	0.926 (0)	0.925 (0)
(Ps-Ns)/(Ps+Ns)	0.926 (0)	1 (0)	0.985 (0)
(Pc-Nc)/(Pc+Nc)	0.925 (0)	0.985 (0)	1 (0)