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	1.78	295	6	0.96	148	3	0.96

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.961 (0.039)	0.964 (0.036)
(Ps-Ns)/(Ps+Ns)	0.961 (0.039)	1 (0)	0.995 (0.005)
(Pc-Nc)/(Pc+Nc)	0.964 (0.036)	0.995 (0.005)	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)	0.667 (0.333)
(Ps-Ns)/(Ps+Ns)	1 (0.083)	1 (0.083)	0.667 (0.333)
(Pc-Nc)/(Pc+Nc)	0.667 (0.333)	0.667 (0.333)	1 (0.083)