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	0.69	149	38	0.59	88	30	0.49
2	0.54	147	59	0.43	88	45	0.32
3	0.27	112	68	0.24	72	49	0.19
4	0.7	163	50	0.53	96	37	0.44

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.983 (0.017)	0.971 (0.029)
(Ps-Ns)/(Ps+Ns)	0.983 (0.017)	1 (0)	0.992 (0.008)
(Pc-Nc)/(Pc+Nc)	0.971 (0.029)	0.992 (0.008)	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)	0.667 (0.333)
(Ps-Ns)/(Ps+Ns)	0.667 (0.333)	1 (0.083)	1 (0.083)
(Pc-Nc)/(Pc+Nc)	0.667 (0.333)	1 (0.083)	1 (0.083)