TABLE 5.

Study 1 hierarchical regression analysis with inference as dependent variable (significant predictors in bold).

Model	M1	M2	M3	M4	M5
Predictor	β
Age in months	0.285*	0.144	0.127	0.083	0.080
WASI vocabulary	0.272*	0.182	0.126	0.060	0.050
Marbles		0.351**	0.321*	0.301*	0.273*
Cards			−0.068	−0.081	−0.111
Covariation			0.190	0.153	0.147
Log blocks				0.201	0.194
Flow of liquid					0.118
AdjR2 = 0.339; ΔR2 = 0.262*** for M1; 0.078** for M2; 0.017 for M3; 0.018 for M4; and 0.009 for M5. *p < 0.05.**p < 0.01.***p < 0.001.
Study 2 hierarchical regression analysis with inference as dependent variable (significant predictors in bold).
Model	M1	M2	M3	M4	M5	M6
Predictor	β
Age in months	−0.174	−0.215*	−0.217*	−0.291**	−0.265**	−0.253**
WASI vocabulary	0.667***	0.583***	0.531***	0.482***	0.445***	0.392***
Marbles		0.237**	0.195*	0.100	0.053	−0.010
Covariation			0.169*	0.157	0.110	0.069
Block design (log)				0.280**	0.233*	0.184*
DTV total					0.224**	0.135
Expflow of liquid						0.317***

AdjR² = 0.488; ΔR² = 0.318*** for M1; 0.042** for M2; 0.022* for M3; 0.044** for M4; 0.035** for M5; and 0.054^*** for M6. *p < 0.05.**p < 0.01.***p < 0.001.