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	1.58	269.5	13.5	0.9	147	15	0.81
2	1.34	234	17	0.86	142	20	0.75
3	1.78	295.5	6.5	0.96	155	7	0.91
4	1.94	320	6	0.96	156	6	0.93

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.966 (0.034)	0.982 (0.018)
(Ps-Ns)/(Ps+Ns)	0.966 (0.034)	1 (0)	0.994 (0.006)
(Pc-Nc)/(Pc+Nc)	0.982 (0.018)	0.994 (0.006)	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)