Table 4. Correlations between working memory and speech performance scores.

	Simple Bivariate Correlations			Partial Correlations
	FDS	BDS	AR	FDS	BDS	AR
SIQ	0.70**	0.43	−0.79**	0.70**	0.54*	−0.77**
SIN	0.43	0.18	−0.50*	0.42	0.28	−0.41
Disyllable	0.71**	0.49*	−0.62**	0.80**	0.72**	−0.58**
Tone	0.65**	0.41	−0.54*	0.60**	0.43	−0.46*
SR	0.69**	0.63**	−0.46*	0.64**	0.64**	−0.40

r values are shown for each correlation. For the partial correlations, the reduced data from the PCA were used to statistically control for demographic variables. SIQ  =  sentence recognition in quiet; SIN  =  sentence recognition in noise; SR  =  self-reported school rank; FDS  =  forward digit span; BDS  =  backward digit span; AR  =  articulation rate.

*p ≤0.01.

** p ≤0.001.