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	1.08	196	21	0.81	118	15	0.77
2	0.84	163	27	0.72	106	20	0.68
3	1.28	218	10	0.91	130	7	0.9
4	1.44	242	9	0.93	139	6	0.92

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.985 (0.015)	0.981 (0.019)
(Ps-Ns)/(Ps+Ns)	0.985 (0.015)	1 (0)	0.998 (0.002)
(Pc-Nc)/(Pc+Nc)	0.981 (0.019)	0.998 (0.002)	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)