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	2.04	338	7	0.96	152	10	0.88
2	2.17	360	9	0.95	150	12	0.85
3	2.2	366	9	0.95	146	16	0.8
4	2.12	355.5	11.5	0.94	147	15	0.81

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	-0.467 (0.533)	-0.728 (0.272)
(Ps-Ns)/(Ps+Ns)	-0.467 (0.533)	1 (0)	0.773 (0.227)
(Pc-Nc)/(Pc+Nc)	-0.728 (0.272)	0.773 (0.227)	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)	-0.183 (0.718)	-0.667 (0.333)
(Ps-Ns)/(Ps+Ns)	-0.183 (0.718)	1 (0.056)	0.548 (0.279)
(Pc-Nc)/(Pc+Nc)	-0.667 (0.333)	0.548 (0.279)	1 (0.083)