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	1.08	196	21	0.81	118	15	0.77
2	0.62	145	44	0.53	93	25	0.58
3	1.49	252	10	0.92	134	7	0.9
4	2.08	342	5	0.97	153	4	0.95

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.919 (0.081)	0.951 (0.049)
(Ps-Ns)/(Ps+Ns)	0.919 (0.081)	1 (0)	0.991 (0.009)
(Pc-Nc)/(Pc+Nc)	0.951 (0.049)	0.991 (0.009)	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)