Table 5.

Correlations between the measures. Numbers in parentheses indicate partial correlations between the cross-section tests after controlling for the Word Sum test. Above the diagonal (in italics) are disattenuated correlations.

Test	SBST	PRT	CST	WST
Santa Barbara Solids Test (SBST)	1	0.90	0.92	0.48
Planes of Reference Test (PRT)	0.54 * (0.48 *)	1	1	0.67
Crystal Slicing Test (CST)	0.58 * (0.53 *)	0.50 * (0.43 *)	1	0.61
Word Sum Test (WST)	0.34 *	0.36 *	0.35 *	1

* p < .001.