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Table 3 Practice effects on repeated administrations over a 4-week interval

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

  Conversation (n = 96) Narration (n = 80)
Effect size Visit 1 Retest Effect size Visit 1 Retest
Cohen’s d M SD M SD Cohen’s d M SD M SD
Lexical diversity − .13 74.14* 33.60 78.54* 33.50 − .09 69.68 33.01 72.80 33.34
Syntax − .10 3.39 1.56 3.55 1.64 − .06 4.82 2.01 4.94 2.18
Talkativeness − .01 13.00 4.10 13.05 3.54 − .17 9.51 3.57 10.12 3.57
Unintelligibility .02 0.26 0.19 0.25 0.19 − .04 0.20 0.19 0.21 0.19
Dysfluency − .08 0.25 0.15 0.26 0.15 − .10 0.25 0.15 0.26 0.16
  1. * prior to FDR correction, p = .018; not significant after FDR correction