Table 4. Bias in mean scores for specific author-reviewer region pairs with uncorrected p-values <=0.05; * shows significant bias after application of the Bonferroni correction for multiple hypothesis testing (Frontiers α = 0.001; IEEE-Spain α < 0.0125; IEEE-International α < 0.0028).

Frontiers		Bonferroni corrected alpha=0.0016
Author	Reviewer	N	Difference	p-Value	Cohen’s d
E. Asia	E. Asia	130	0.35	0.047	0.3
E. Asia	S. Europe	34	-0.58	0.028	0.4
N. America	E. Europe	36	-0.63	0.034	0.5
IEEE Spain		Bonferroni corrected alpha=0.0125
Author	Reviewer	N	Bias	p-Value	Cohen’s d
E. Asia	S. Europe	46	2.34	0.005*	1.9
IEEE International		Bonferroni corrected alpha=0.0028
Author	Reviewer	N	Bias	p-Value	Cohen’s d
E. Asia	N. America	31	1.06	<0.001*	0.9
E. Asia	W. Europe	60	-0.46	0.048	0.4
N. America	W. Europe	223	-0.29	0.04	0.2
S. Europe	S. Europe	109	0.40	0.023	0.3
W. Europe	S. Europe	153	-0.30	0.050	0.3
W. Europe	W. Europe	344	0.28	0.026	0.2