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Table 1 Means (SDs) for demographic variables and standardized tests for DS and control groups

From: Verbal short-term memory deficits in Down syndrome: phonological, semantic, or both?

 

DS

Control

Significance

N

18

18

 

Age

19.18 (3.34)

5.85 (2.05)

t(17) = 16.36, p < .001

Male (%)

27.8

27.8

χ2 (1) = 0, p = 1

Caucasian (%)

77.8

88.9

χ2 (1) < 1.0, p > .37

Mother Years of Educationa

15.59 (3.15)

16.19 (2.04)

t(15) = −0.79, p > .43

Father Years of Educationa

15.81 (2.40)

16.75 (1.48)

t(15) = −1.83 p > .08

PPVT-IIIb Raw Score

89.78 (27.42)

91.00 (27.40)

t(17) = −1.48, p > .15

PPVT-IIIb Age Equivalent

6.95 (2.32)

7.03 (2.48)

t(17) = −.85, p > .40

DAS PCc Ability Score

105.24 (18.83)

114.71 (19.84)

t(16) = −1.5, p > .14

DAS PCc Age Equivalent

6.27 (2.28)

7.55 (2.63)

t(16) = −1.63, p > .12

DAS RDd Raw Score

10.39 (3.88)

17.28 (5.14)

t(17) = −5.87, p < .001

DAS RDd Age Equivalent

3.95 (1.17)

7.48 (3.83)

t(17) = −4.14, p < .01

  1. an in DS group for father and mother years of education is 16; one participant was missing data for mother education, one participant was missing data for father education, and one of the siblings with DS (see Method) was removed from mother and father years of education analyses
  2. b Peabody Picture Vocabulary Test, Third Edition
  3. c Differential Ability Scales Pattern Construction Subtest (n = 17 in control group)
  4. d Differential Ability Scales Recall of Digits Subtest
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Journal of Neurodevelopmental Disorders

ISSN: 1866-1955

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