Table 5. Outcome of one-factorial ANOVAs of familiar size of MGA.

MGA		F	p-value	Partial η2	Effect size	Sample size	Corr. among rep measures	Critical F	Power
Matchboxes Germany	All	5.107	0.031	0.145	0.4118	32	0.85539	4.17	1
	B	0.19	0.669	0.12	0.3692	16	0.80199	4.54	0.99
	M	5.948	0.028	0.284	0.6298	16	0.85805	4.54	1
Matchboxes Scotland*	All	11.33	<0.005	0.34	0.72	24	0.82	4.30	1.00

ANOVAs were calculated for both visual conditions and corresponding results of post-hoc power analyses of MGA were computed with G*power 3. The effect size was computed using the actual partial η² of our data for the binocular and monocular condition and for the partial η² that was reported by McIntosh & Lashley [11].Power analyses are based on the a priorily chosen α error probability threshold of 0.05. *data from McIntosh & Lashley [11].