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	0.67	149	41	0.57	92	26	0.56
2	0.7	163	49	0.54	103	32	0.53
3	0.62	145	44	0.53	93	25	0.58

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.376 (0.754)	-0.967 (0.164)
(Ps-Ns)/(Ps+Ns)	0.376 (0.754)	1 (0)	-0.127 (0.919)
(Pc-Nc)/(Pc+Nc)	-0.967 (0.164)	-0.127 (0.919)	1 (0)

Kendall tau rank correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0.333)	0.333 (1)	-1 (0.333)
(Ps-Ns)/(Ps+Ns)	0.333 (1)	1 (0.333)	-0.333 (1)
(Pc-Nc)/(Pc+Nc)	-1 (0.333)	-0.333 (1)	1 (0.333)