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	1.29	206	18	0.84	125	11	0.84
2	-1.35	25	222	-0.8	20	109	-0.69
3	0.32	131	85	0.21	80	52	0.21
4	0.53	128	51	0.43	83	30	0.47
5	-0.47	84	153	-0.29	53	79	-0.2
6	0.94	176	40	0.63	103	27	0.58
7	-0.21	95	125	-0.14	55	65	-0.08
8	1.24	205	24	0.79	115	20	0.7
9	0.55	124	43	0.49	90	29	0.51
10	1.05	188	36	0.68	101	21	0.66
11	-0.1	95	110	-0.07	66	54	0.1
12	-0.49	60	132	-0.38	48	76	-0.23
13	1.37	211	11	0.9	123	8	0.88
14	-0.98	41	184	-0.64	28	95	-0.54
15	1.05	160	7	0.92	100	4	0.92

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.992 (0)	0.988 (0)
(Ps-Ns)/(Ps+Ns)	0.992 (0)	1 (0)	0.997 (0)
(Pc-Nc)/(Pc+Nc)	0.988 (0)	0.997 (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)	0.938 (0)	0.938 (0)
(Ps-Ns)/(Ps+Ns)	0.938 (0)	1 (0)	1 (0)
(Pc-Nc)/(Pc+Nc)	0.938 (0)	1 (0)	1 (0)