. 2014 Sep 5;9(9):e107112. doi: 10.1371/journal.pone.0107112

Table 2. ANOVA effect sizes.

Variables	Skill level (SL)	Numerical relation (NR)	SL × NR
SI	Overloaded: η² = 0.12^; Underloaded: η² = 0.16^*	Overloaded: η² = 0.001; Underloaded: η² = 0.07^*	Overloaded: η² = 0.02; Underloaded: η² = 0.005
CdtMG	η² = 0.04	η² = 0.16^**	η² = 0.02
CdtG	η² = 0.01	η² = 0.14^**	η² = 0.02
dtH1	η² = 0.001	η² = 0.02	η² = 0.05
dtH2	η² = 0.01	η² = 0.07^*	η² = 0.02
dtV1	η² = 0.004	η² = 0.09^*	η²<0.001
dtV2	η² = 0.06^*	η² = 0.01	η² = 0.002

Main effects of skill level and numerical relation and interaction effects of skill level x numerical relation on: (1) stretch index (SI); (2) centroid's distance to mini goals line (CdtMG); (3) centroid's distance to goal (CdtG); (4) horizontal lines' distances (dtH1 and dtH2) and (5) vertical lines' distances (dtV1 and dtV2).

*Moderate effect.

**Large effect.