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	1.02	112	12	0.81	71	9	0.78
2	0.72	89	18	0.66	61	13	0.65
3	1.18	123	7	0.89	78	5	0.88
4	1.36	139	6	0.92	81	4	0.91

Pearson correlations of survey scores (and p-values)
	mean	(Ps-Ns)/(Ps+Ns)	(Pc-Nc)/(Pc+Nc)
mean	1 (0)	0.983 (0.017)	0.986 (0.014)
(Ps-Ns)/(Ps+Ns)	0.983 (0.017)	1 (0)	0.996 (0.004)
(Pc-Nc)/(Pc+Nc)	0.986 (0.014)	0.996 (0.004)	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)