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	1.81	272	11	0.92	130	8	0.88
2	0.42	119	58	0.34	76	36	0.36
3	0.91	167	36	0.65	100	23	0.63
4	1.53	236	16	0.87	122	10	0.85

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.98 (0.02)	0.981 (0.019)
(Ps-Ns)/(Ps+Ns)	0.98 (0.02)	1 (0)	0.999 (0.001)
(Pc-Nc)/(Pc+Nc)	0.981 (0.019)	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)	1 (0.083)
(Ps-Ns)/(Ps+Ns)	1 (0.083)	1 (0.083)	1 (0.083)
(Pc-Nc)/(Pc+Nc)	1 (0.083)	1 (0.083)	1 (0.083)