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Table 5 Construct validity: Conversation (n = 96)

From: 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

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
  1. 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
  2. ***p < .001, **p < .01, *p < .05