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	1.77	582	20	0.93	281	16	0.89
2	1.16	441	74	0.71	227	45	0.67
3	1.17	423	51	0.78	238	34	0.75
4	1.65	547	25	0.91	278	15	0.9

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.963 (0.037)	0.942 (0.058)
(Ps-Ns)/(Ps+Ns)	0.963 (0.037)	1 (0)	0.993 (0.007)
(Pc-Nc)/(Pc+Nc)	0.942 (0.058)	0.993 (0.007)	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)