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	-0.19	24	54	-0.38	24	43	-0.28
2	0.11	62	45	0.16	60	38	0.22
3	0.04	60	54	0.05	57	44	0.13
4	-0.15	33	56	-0.26	30	51	-0.26

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.997 (0.003)	0.995 (0.005)
(Ps-Ns)/(Ps+Ns)	0.997 (0.003)	1 (0)	0.986 (0.014)
(Pc-Nc)/(Pc+Nc)	0.995 (0.005)	0.986 (0.014)	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)