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	1.8	304	13	0.92	146	10	0.87
2	0.38	132	70	0.31	85	43	0.33
3	0.86	181	41	0.63	109	27	0.6
4	1.52	265	19	0.87	137	12	0.84

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.98 (0.02)	0.982 (0.018)
(Ps-Ns)/(Ps+Ns)	0.98 (0.02)	1 (0)	0.999 (0.001)
(Pc-Nc)/(Pc+Nc)	0.982 (0.018)	0.999 (0.001)	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)