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	1.77	294	7	0.95	142	6	0.92
2	1.8	304	13	0.92	146	10	0.87
3	1.49	252	10	0.92	134	7	0.9
4	1.78	295	6	0.96	148	3	0.96

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.505 (0.495)	0.162 (0.838)
(Ps-Ns)/(Ps+Ns)	0.505 (0.495)	1 (0)	0.91 (0.09)
(Pc-Nc)/(Pc+Nc)	0.162 (0.838)	0.91 (0.09)	1 (0)

Kendall tau rank correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0.083)	0.183 (0.718)	0 (1)
(Ps-Ns)/(Ps+Ns)	0.183 (0.718)	1 (0.056)	0.913 (0.071)
(Pc-Nc)/(Pc+Nc)	0 (1)	0.913 (0.071)	1 (0.083)