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	2.49	407	3	0.99	155	3	0.96
2	0.27	112	68	0.24	72	49	0.19
3	-1.62	8	270	-0.94	7	148	-0.91
4	1.7	293	17	0.89	130	16	0.78

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.983 (0.017)	0.989 (0.011)
(Ps-Ns)/(Ps+Ns)	0.983 (0.017)	1 (0)	0.999 (0.001)
(Pc-Nc)/(Pc+Nc)	0.989 (0.011)	0.999 (0.001)	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)	1 (0.083)	1 (0.083)
(Ps-Ns)/(Ps+Ns)	1 (0.083)	1 (0.083)	1 (0.083)
(Pc-Nc)/(Pc+Nc)	1 (0.083)	1 (0.083)	1 (0.083)