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	1.14	402	26	0.88	279	23	0.85
2	-0.28	113	204	-0.29	95	148	-0.22
3	1.07	379	27	0.87	258	24	0.83
4	0.18	167	107	0.22	144	85	0.26
5	0.92	344	40	0.79	253	32	0.78
6	1.15	398	19	0.91	273	17	0.88
7	0.6	251	55	0.64	194	45	0.62
8	1.05	373	28	0.86	274	25	0.83
9	-0.49	72	235	-0.53	62	171	-0.47
10	0.98	347	22	0.88	259	21	0.85
11	0.74	273	29	0.81	214	26	0.78
12	0.51	226	57	0.6	194	46	0.62
13	0.61	256	56	0.64	207	49	0.62
14	0.43	203	63	0.53	173	53	0.53
15	0.72	290	52	0.7	222	45	0.66
16	0.36	168	51	0.53	140	48	0.49
17	0.58	234	42	0.7	189	38	0.67
18	0.62	244	39	0.72	195	33	0.71
19	0.54	227	52	0.63	196	44	0.63
20	0.07	147	123	0.09	122	94	0.13

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.961 (0)	0.961 (0)
(Ps-Ns)/(Ps+Ns)	0.961 (0)	1 (0)	0.999 (0)
(Pc-Nc)/(Pc+Nc)	0.961 (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)	0.899 (0)
(Ps-Ns)/(Ps+Ns)	0.926 (0)	1 (0)	0.962 (0)
(Pc-Nc)/(Pc+Nc)	0.899 (0)	0.962 (0)	1 (0)