TABLE 6.

Hierarchical regression of ERA as a function of age, country of origin, and AIQ measures.

Step and predictor variable	R2	ΔR2	sr2	β
Step 1	0.07	0.07
Age			0.07	0.07
Country of origin			0.27*	0.28
Step 2	0.15**	0.08*
Visual spatial processing			−0.09	−0.11
Reaction time			−0.24*	−0.25
Step 3	0.28***	0.13***
Interaction between visual spatial			0.36***	0.42
Processing and reaction time

*p < 0.05. **p < 0.01. ***p < 0.001.