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	2.08	343	6	0.97	147	5	0.93
2	1.84	305	7	0.96	142	6	0.92
3	2.28	373	3	0.98	155	3	0.96
4	2.44	398	3	0.99	156	3	0.96
5	1.54	262	12	0.91	125	10	0.85
6	1.67	285	15	0.9	136	12	0.84
7	1.7	293	17	0.89	130	16	0.78
8	1.62	282	19	0.87	137	15	0.8
9	0.69	149	38	0.59	88	30	0.49
10	0.54	147	59	0.43	88	45	0.32
11	0.27	112	68	0.24	72	49	0.19
12	0.7	163	50	0.53	96	37	0.44
13	2.77	450	1	1	156	1	0.99
14	2.99	486	2	0.99	160	2	0.98
15	2.49	407	3	0.99	155	3	0.96
16	2.78	454	3	0.99	159	2	0.98
17	2.8	456	3	0.99	152	3	0.96
18	1.38	251	27	0.81	119	20	0.71
19	1.86	316	14	0.92	135	12	0.84
20	2.52	415	7	0.97	150	5	0.94
21	1.79	313	23	0.86	134	15	0.8
22	3.08	500	1	1	158	1	0.99
23	2.56	419	4	0.98	153	4	0.95
24	2.96	483	3	0.99	158	2	0.98
25	-1.56	8	260	-0.94	7	148	-0.91
26	-1.33	16	232	-0.87	10	139	-0.87
27	-1.62	8	270	-0.94	7	148	-0.91
28	-1.7	6	281	-0.96	5	154	-0.94

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.951 (0)	0.964 (0)
(Ps-Ns)/(Ps+Ns)	0.951 (0)	1 (0)	0.998 (0)
(Pc-Nc)/(Pc+Nc)	0.964 (0)	0.998 (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)	0.871 (0)	0.87 (0)
(Ps-Ns)/(Ps+Ns)	0.871 (0)	1 (0)	0.961 (0)
(Pc-Nc)/(Pc+Nc)	0.87 (0)	0.961 (0)	1 (0)