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	1.28	218	10	0.91	130	7	0.9
2	-0.46	59	133	-0.39	43	74	-0.26
3	1.8	304	13	0.92	146	10	0.87
4	1.96	325	7	0.96	154	4	0.95

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.972 (0.028)	0.969 (0.031)
(Ps-Ns)/(Ps+Ns)	0.972 (0.028)	1 (0)	0.999 (0.001)
(Pc-Nc)/(Pc+Nc)	0.969 (0.031)	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)	0.667 (0.333)
(Ps-Ns)/(Ps+Ns)	1 (0.083)	1 (0.083)	0.667 (0.333)
(Pc-Nc)/(Pc+Nc)	0.667 (0.333)	0.667 (0.333)	1 (0.083)