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	-0.14	51	73	-0.18	49	58	-0.08
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)	0.988 (0.012)	0.895 (0.105)
(Ps-Ns)/(Ps+Ns)	0.988 (0.012)	1 (0)	0.951 (0.049)
(Pc-Nc)/(Pc+Nc)	0.895 (0.105)	0.951 (0.049)	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)	0.183 (0.718)
(Ps-Ns)/(Ps+Ns)	1 (0.083)	1 (0.083)	0.183 (0.718)
(Pc-Nc)/(Pc+Nc)	0.183 (0.718)	0.183 (0.718)	1 (0.056)