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	0.97	179	38	0.65	110	25	0.63
2	0.82	166	47	0.56	92	38	0.42
3	0.46	122	55	0.38	74	39	0.31
4	1.51	235	15	0.88	124	10	0.85
5	1.28	209	22	0.81	111	16	0.75
6	1.66	265	23	0.84	125	13	0.81
7	0.42	152	90	0.26	83	50	0.25
8	1.05	201	48	0.61	103	28	0.57
9	-0.42	72	134	-0.3	55	74	-0.15
10	0.03	100	96	0.02	65	49	0.14
11	0.6	141	54	0.45	77	33	0.4
12	-0.89	30	160	-0.68	26	86	-0.54
13	-0.73	35	142	-0.6	28	78	-0.47
14	0.28	107	66	0.24	70	40	0.27
15	0.75	151	41	0.57	88	25	0.56

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.984 (0)	0.985 (0)
(Ps-Ns)/(Ps+Ns)	0.984 (0)	1 (0)	0.994 (0)
(Pc-Nc)/(Pc+Nc)	0.985 (0)	0.994 (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)	0.943 (0)	0.924 (0)
(Ps-Ns)/(Ps+Ns)	0.943 (0)	1 (0)	0.981 (0)
(Pc-Nc)/(Pc+Nc)	0.924 (0)	0.981 (0)	1 (0)