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	2.77	450	1	1	156	1	0.99
2	2.99	486	2	0.99	160	2	0.98
3	2.49	407	3	0.99	155	3	0.96
4	2.78	454	3	0.99	159	2	0.98

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.041 (0.959)	0.707 (0.293)
(Ps-Ns)/(Ps+Ns)	0.041 (0.959)	1 (0)	0.662 (0.338)
(Pc-Nc)/(Pc+Nc)	0.707 (0.293)	0.662 (0.338)	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)	-0.236 (0.655)	0.183 (0.718)
(Ps-Ns)/(Ps+Ns)	-0.236 (0.655)	1 (0.083)	0.775 (0.157)
(Pc-Nc)/(Pc+Nc)	0.183 (0.718)	0.775 (0.157)	1 (0.056)