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	0.55	96	11	0.79	93	8	0.84
2	0.22	49	14	0.56	49	13	0.58
3	0.39	84	23	0.57	79	21	0.58
4	0.06	35	25	0.17	33	23	0.18

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.933 (0.067)	0.934 (0.066)
(Ps-Ns)/(Ps+Ns)	0.933 (0.067)	1 (0)	0.999 (0.001)
(Pc-Nc)/(Pc+Nc)	0.934 (0.066)	0.999 (0.001)	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)	0.913 (0.071)
(Ps-Ns)/(Ps+Ns)	1 (0.083)	1 (0.083)	0.913 (0.071)
(Pc-Nc)/(Pc+Nc)	0.913 (0.071)	0.913 (0.071)	1 (0.056)