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	2.76	827	4	0.99	282	4	0.97
2	2.12	660	29	0.92	253	22	0.84
3	2.15	659	17	0.95	264	15	0.89
4	2.63	795	10	0.98	283	7	0.95

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.936 (0.064)	0.951 (0.049)
(Ps-Ns)/(Ps+Ns)	0.936 (0.064)	1 (0)	0.999 (0.001)
(Pc-Nc)/(Pc+Nc)	0.951 (0.049)	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)