Table 4.

Pearson correlations between predictor variables.

	Age	PPVT	TROG-2	Nonword	Dot	Counting	Odd	Total WM
Age	1	0.85^a	0.64^a	0.53^a	0.76^a	0.76^a	0.68^a	0.82^a
PPVT		1	0.73^a	0.53^a	0.67^a	0.70^a	0.69^a	0.76^a
TROG			1	0.57^a	0.51^a	0.60^a	0.59^a	0.66^a
Nonword				1	0.53^a	0.59^a	0.44^a	0.69^a
Dot					1	0.70^a	0.70^a	0.89^a
Counting						1	0.70^a	0.90^a
Odd							1	0.87^a
AWMA Total WM								1

PPVT =Peabody Picture Vocabulary Test; TROG-2 =Test of Reception of Grammar, Nonword =Automated Working Memory Assessment (AWMA) Nonword Recall Subtest; Dot =AWMA Dot Matrix Subtest; Counting =AWMA Counting Recall Subtest; Odd =AWMA Odd-one-out subtest; Total WM =Composite score of AWMA working memory subtests. Correlations for standardised measures are based on raw scores.

p<0.05 (two-tailed).