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	0.06	81	71	0.07	75	51	0.19
2	-0.18	51	79	-0.22	49	60	-0.1
3	-0.1	43	58	-0.15	41	52	-0.12
4	-0.19	55	84	-0.21	54	64	-0.08

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.99 (0.01)	0.896 (0.104)
(Ps-Ns)/(Ps+Ns)	0.99 (0.01)	1 (0)	0.947 (0.053)
(Pc-Nc)/(Pc+Nc)	0.896 (0.104)	0.947 (0.053)	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)	0.667 (0.333)	0 (1)
(Ps-Ns)/(Ps+Ns)	0.667 (0.333)	1 (0.083)	0.333 (0.75)
(Pc-Nc)/(Pc+Nc)	0 (1)	0.333 (0.75)	1 (0.083)