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	3.3	535.5	1.5	0.99	159	3	0.96
2	1.88	322	17	0.9	142	20	0.75
3	2.36	391	8	0.96	150	12	0.85
4	3.02	493.5	4.5	0.98	157	5	0.94

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.94 (0.06)	0.988 (0.012)
(Ps-Ns)/(Ps+Ns)	0.94 (0.06)	1 (0)	0.977 (0.023)
(Pc-Nc)/(Pc+Nc)	0.988 (0.012)	0.977 (0.023)	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)