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	2.8	456	3	0.99	152	3	0.96
2	1.38	251	27	0.81	119	20	0.71
3	1.86	316	14	0.92	135	12	0.84
4	2.52	415	7	0.97	150	5	0.94

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.959 (0.041)	0.98 (0.02)
(Ps-Ns)/(Ps+Ns)	0.959 (0.041)	1 (0)	0.993 (0.007)
(Pc-Nc)/(Pc+Nc)	0.98 (0.02)	0.993 (0.007)	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)	1 (0.083)
(Ps-Ns)/(Ps+Ns)	1 (0.083)	1 (0.083)	1 (0.083)
(Pc-Nc)/(Pc+Nc)	1 (0.083)	1 (0.083)	1 (0.083)