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	407	26	0.88	282	23	0.85
2	-0.27	116	206	-0.28	97	150	-0.21
3	1.07	382	28	0.86	260	25	0.82
4	0.18	169	108	0.22	146	86	0.26
5	0.92	346	40	0.79	254	32	0.78
6	1.15	399	19	0.91	274	17	0.88
7	0.59	251	56	0.64	194	46	0.62
8	1.05	375	28	0.86	275	25	0.83
9	-0.49	72	235	-0.53	62	171	-0.47
10	0.98	347	23	0.88	259	22	0.84
11	0.74	274	29	0.81	215	26	0.78
12	0.51	227	57	0.6	195	46	0.62
13	0.6	256	57	0.64	207	50	0.61
14	0.42	203	63	0.53	173	53	0.53
15	0.72	290	53	0.69	222	46	0.66
16	0.35	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	228	52	0.63	197	44	0.63
20	0.08	148	123	0.09	123	94	0.13

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.959 (0)	0.959 (0)
(Ps-Ns)/(Ps+Ns)	0.959 (0)	1 (0)	0.999 (0)
(Pc-Nc)/(Pc+Nc)	0.959 (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)	0.915 (0)	0.878 (0)
(Ps-Ns)/(Ps+Ns)	0.915 (0)	1 (0)	0.952 (0)
(Pc-Nc)/(Pc+Nc)	0.878 (0)	0.952 (0)	1 (0)