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	1.67	285	15	0.9	136	12	0.84
2	1.38	251	27	0.81	119	20	0.71
3	2.56	419	4	0.98	153	4	0.95
4	2.28	373	3	0.98	155	3	0.96

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.948 (0.052)	0.94 (0.06)
(Ps-Ns)/(Ps+Ns)	0.948 (0.052)	1 (0)	0.999 (0.001)
(Pc-Nc)/(Pc+Nc)	0.94 (0.06)	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)	0.913 (0.071)	0.667 (0.333)
(Ps-Ns)/(Ps+Ns)	0.913 (0.071)	1 (0.056)	0.913 (0.071)
(Pc-Nc)/(Pc+Nc)	0.667 (0.333)	0.913 (0.071)	1 (0.083)