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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
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Journal of Neurodevelopmental Disorders

ISSN: 1866-1955

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