Table 5. Experiment 2: Results of the paired-samples t-tests (test value = 0) conducted for the difference of the relative estimation errors in the comparisons width vs. depth and height vs. width, differentiated according to the seven levels of surface area.

Comparison	Surface area		SE	t	df	p	αcorr
Width vs. depth	16 m2	0.096	0.026	3.731	38	<.001*	.007
	25 m2	0.080	0.027	2.919	38	.006*	.008
	36 m2	0.0300	0.023	1.303	38	.200	.010
	49 m2	0.0303	0.024	1.257	38	.216	.013
	64 m 2	0.001	0.021	0.055	38	.957	.050
	81 m2	0.003	0.026	0.115	38	.909	.025
	100 m2	−0.019	0.021	−0.902	38	.373	.017
Height vs. width	16 m2	0.085	0.025	3.422	38	.002*	.017
	25 m2	0.109	0.026	4.146	38	<.001*	.007
	36 m2	0.112	0.030	3.660	38	.001*	.008
	49 m2	0.084	0.035	2.389	38	.022*	.050
	64 m 2	0.089	0.028	3.146	38	.003*	.025
	81 m2	0.144	0.042	3.452	38	.001*	.013
	100 m2	0.139	0.039	3.604	38	.001*	.010

Note: α_corr indicates the Bonferroni-Holm adjusted alpha level. Significant p-values (two-tailed) are marked by an asterisk.