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	2.29	386.5	15.5	0.92	147	15	0.81
2	3.58	580.5	0.5	1	161	1	0.99
3	3.06	498	2	0.99	158	4	0.95
4	3.46	563	2	0.99	160	2	0.98

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.95 (0.05)	0.983 (0.017)
(Ps-Ns)/(Ps+Ns)	0.95 (0.05)	1 (0)	0.989 (0.011)
(Pc-Nc)/(Pc+Nc)	0.983 (0.017)	0.989 (0.011)	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)	0.913 (0.071)	1 (0.083)
(Ps-Ns)/(Ps+Ns)	0.913 (0.071)	1 (0.056)	0.913 (0.071)
(Pc-Nc)/(Pc+Nc)	1 (0.083)	0.913 (0.071)	1 (0.083)