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	1.64	116	8	0.87	58	5	0.84
2	0.47	55	24	0.39	34	16	0.36
3	0.94	76	14	0.69	45	11	0.61
4	1.48	105	7	0.88	56	5	0.84

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.972 (0.028)	0.988 (0.012)
(Ps-Ns)/(Ps+Ns)	0.972 (0.028)	1 (0)	0.995 (0.005)
(Pc-Nc)/(Pc+Nc)	0.988 (0.012)	0.995 (0.005)	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)	0.667 (0.333)	0.913 (0.071)
(Ps-Ns)/(Ps+Ns)	0.667 (0.333)	1 (0.083)	0.913 (0.071)
(Pc-Nc)/(Pc+Nc)	0.913 (0.071)	0.913 (0.071)	1 (0.056)