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	0.54	137	49	0.47	83	37	0.38
2	0.67	149	41	0.57	92	26	0.56
3	0.7	163	49	0.54	103	32	0.53
4	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)	0.878 (0.122)	0.755 (0.245)
(Ps-Ns)/(Ps+Ns)	0.878 (0.122)	1 (0)	0.879 (0.121)
(Pc-Nc)/(Pc+Nc)	0.755 (0.245)	0.879 (0.121)	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)	0 (1)
(Ps-Ns)/(Ps+Ns)	0.667 (0.333)	1 (0.083)	0.333 (0.75)
(Pc-Nc)/(Pc+Nc)	0 (1)	0.333 (0.75)	1 (0.083)