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	2.08	343	6	0.97	147	5	0.93
2	1.84	305	7	0.96	142	6	0.92
3	2.28	373	3	0.98	155	3	0.96
4	2.44	398	3	0.99	156	3	0.96

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.996 (0.004)	0.948 (0.052)
(Ps-Ns)/(Ps+Ns)	0.996 (0.004)	1 (0)	0.939 (0.061)
(Pc-Nc)/(Pc+Nc)	0.948 (0.052)	0.939 (0.061)	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)