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	3.27	530.5	0.5	1	161	1	0.99
2	3.49	566	1	1	160	2	0.98
3	2.99	486.5	1.5	0.99	159	3	0.96
4	3.28	534	2	0.99	160	2	0.98

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.689 (0.311)	0.707 (0.293)
(Ps-Ns)/(Ps+Ns)	0.689 (0.311)	1 (0)	0.688 (0.312)
(Pc-Nc)/(Pc+Nc)	0.707 (0.293)	0.688 (0.312)	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)	0.408 (0.439)	0.183 (0.718)
(Ps-Ns)/(Ps+Ns)	0.408 (0.439)	1 (0.083)	0.671 (0.221)
(Pc-Nc)/(Pc+Nc)	0.183 (0.718)	0.671 (0.221)	1 (0.056)