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	0.7	163	49	0.54	103	32	0.53
2	1.99	326	4	0.98	149	2	0.97
3	0.79	179	51	0.56	104	28	0.58
4	-2.7	1	438	-1	1	157	-0.99

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.998 (0.002)	0.998 (0.002)
(Ps-Ns)/(Ps+Ns)	0.998 (0.002)	1 (0)	1 (0)
(Pc-Nc)/(Pc+Nc)	0.998 (0.002)	1 (0)	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)