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	1.54	262	12	0.91	125	10	0.85
2	1.67	285	15	0.9	136	12	0.84
3	1.7	293	17	0.89	130	16	0.78
4	1.62	282	19	0.87	137	15	0.8

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	-0.342 (0.658)	-0.646 (0.354)
(Ps-Ns)/(Ps+Ns)	-0.342 (0.658)	1 (0)	0.724 (0.276)
(Pc-Nc)/(Pc+Nc)	-0.646 (0.354)	0.724 (0.276)	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)	-0.333 (0.75)	-0.667 (0.333)
(Ps-Ns)/(Ps+Ns)	-0.333 (0.75)	1 (0.083)	0.667 (0.333)
(Pc-Nc)/(Pc+Nc)	-0.667 (0.333)	0.667 (0.333)	1 (0.083)