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Table 2 Variance decomposition of CSBS-ITC item-level raw scores from second G Study by risk status

From: Using generalizability theory to evaluate the comparative reliability of developmental measures in neurogenetic syndrome and low-risk populations

 

LRC

AS

PWS

WS

Source of variance

Variance

Percentage

Variance

Percentage

Variance

Percentage

Variance

Percentage

σ2Person

0.027

4.86%

0.083

12.51%

0.117

16.27%

0.096

13.44%

σ2Age

0.276

49.61%

0.016

2.43%

0.195

27.13%

0.199

27.91%

σ2Item

0.038

6.86%

0.308

46.60%

0.106

14.74%

0.128

17.97%

σ2Person*Age

0.009

1.58%

0.007

1.11%

0.031

4.29%

0.013

1.80%

σ2Person*Item

0.024

4.30%

0.101

15.35%

0.064

8.91%

0.073

10.18%

σ2Age*Item

0.068

12.14%

0.004

0.63%

0.033

4.63%

0.034

4.71%

σ2Residual

0.115

20.65%

0.141

21.37%

0.173

24.02%

0.171

23.99%

Total

0.557

100%

0.661

100%

0.719

100%

0.715

100%