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 7 Intercorrelations among ELS measures as a function of task

	Syntax		Talkativeness		Unintelligibility		Dysfluency
	Conversation	Narration	Conversation	Narration	Conversation	Narration	Conversation	Narration
Lexical diversity	.93***	84***	.19	.21	− .61***	− .59***	.54***	.37**
Syntax			.17	− .09	− .57***	− .56***	.53***	.47***
Talkativeness					− .01	.09	− .16	− .04
Unintelligibility							− .37***	− .30**

ISSN: 1866-1955