Table 2.

Stepwise regression models of mathematical abilities with full scale IQ, reading ability, and multi component working memory measures (Block Recall, Counting Recall, Digit Recall, Backward Digit Recall) as predictors.

Model

(SE)

R²

R_{change}^{2}

Numerical Operations

Predictor

Block Recall

.68

.23

.46

.22

–

.006

Mathematical Reasoning

Predictors

Full scale IQ

.75

.16

.60

.54

–

<.001

Word reading

.46

.20

.30

.61

.07

.024