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	-1.56	8	260	-0.94	7	148	-0.91
2	-1.33	16	232	-0.87	10	139	-0.87
3	-1.62	8	270	-0.94	7	148	-0.91
4	-1.7	6	281	-0.96	5	154	-0.94

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.984 (0.016)	0.972 (0.028)
(Ps-Ns)/(Ps+Ns)	0.984 (0.016)	1 (0)	0.963 (0.037)
(Pc-Nc)/(Pc+Nc)	0.972 (0.028)	0.963 (0.037)	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)	0.913 (0.071)	0.913 (0.071)
(Ps-Ns)/(Ps+Ns)	0.913 (0.071)	1 (0.056)	1 (0.056)
(Pc-Nc)/(Pc+Nc)	0.913 (0.071)	1 (0.056)	1 (0.056)