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	0.79	179	51	0.56	104	28	0.58
2	2.08	342	5	0.97	153	4	0.95
3	1.56	266	13	0.91	131	9	0.87
4	1.96	325	7	0.96	154	4	0.95

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.967 (0.033)	0.983 (0.017)
(Ps-Ns)/(Ps+Ns)	0.967 (0.033)	1 (0)	0.996 (0.004)
(Pc-Nc)/(Pc+Nc)	0.983 (0.017)	0.996 (0.004)	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)	0.913 (0.071)
(Ps-Ns)/(Ps+Ns)	1 (0.083)	1 (0.083)	0.913 (0.071)
(Pc-Nc)/(Pc+Nc)	0.913 (0.071)	0.913 (0.071)	1 (0.056)