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	0.56	127	34	0.58	106	27	0.59
2	0.2	96	63	0.21	79	53	0.2
3	0.5	111	28	0.6	87	23	0.58
4	0.75	141	15	0.81	121	11	0.83

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.989 (0.011)	0.996 (0.004)
(Ps-Ns)/(Ps+Ns)	0.989 (0.011)	1 (0)	0.998 (0.002)
(Pc-Nc)/(Pc+Nc)	0.996 (0.004)	0.998 (0.002)	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)	1 (0.083)
(Ps-Ns)/(Ps+Ns)	0.667 (0.333)	1 (0.083)	0.667 (0.333)
(Pc-Nc)/(Pc+Nc)	1 (0.083)	0.667 (0.333)	1 (0.083)