Spoken language outcome measures for treatment studies in Down syndrome: feasibility, practice effects, test-retest reliability, and construct validity of variables generated from expressive language sampling

Table 5 Construct validity: Conversation (n = 96)

Measures	CELF EV	CELF FS	Vineland EC	GFTA SiW	SB5 VWM
Lexical diversity	.64***	.60***	.44***	.69***	.63***
Syntax	.58***	.56***	.40***	.61***	.64***
Talkativeness	.22*	.27**	− .13	.05	.10
Unintelligibility	− .62***	− .50***	− .32**	− .56***	− .56***
Dysfluency	.32**	.23*	.13	.42***	− .11

Note that all values are bivariate zero-order correlations (uncorrected) except for that between dysfluency and the SB5 VWM score, which is a partial correlation controlling for syntax (MLU). All significant correlations remain after FDR correction
***p < .001, **p < .01, *p < .05

ISSN: 1866-1955