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Language Testing in Asia

Table 7 G-study (method of scoring)

From: The affectability of writing assessment scores: a G-theory analysis of rater, task, and scoring method contribution

Mixed

Holistic

Analytical

Source

SS

VC

%

SS

VC

%

SS

VC

%

S

25956.32

0.508744

65.06321

18934.3

0.361645

64.69993

15478.32

0.295636

69.54869

T

1106.856

0.021694

2.774492

1465.416

0.027989

5.007437

1009.416

0.01928

4.535606

R

8659.85

0.169733

21.70715

4586.256

0.087597

15.67158

3098.952

0.05919

13.92451

ST

856.14

0.01678

2.146037

1463.25

0.027948

5.000035

861.326

0.016451

3.870194

SR

1256.369

0.024625

3.149268

994.642

0.018998

3.398766

161.358

0.003082

0.725029

TR

2058.47

0.040346

5.159848

1820.93

0.03478

6.222255

1646

0.031439

7.395967

Total

39894.01

 

100

29264.79

 

100

22255.37

 

100

Coef_G relative

.85

  

.81

  

.87

  

Coef_G absolute

.84

  

.80

  

.86

  

Relative ErrV

.00189

  

.001810

  

.001763

  

Absolute ErrV

.00201

  

.001873

  

.001819

  

Relative SE

.04690

  

.05132

  

.04189

  

Absolute SE

.04731

  

.05322

  

.04236

  
  1. SS sum of squares, df degree of freedom
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