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An IERI – International Educational Research Institute Journal

Table 2 The layout of the data structure for the SEM analysis

From: A structural equation modeling approach for examining position effects in large-scale assessments

Examinees

Item responses

Forms

Passage positions

Item positions

i1

…

i45

f1

f2

f3

f4

pp1

…

pp7

ip1

…

ip45

1

   

1

0

0

0

1

…

7

46

…

4

2

   

0

1

0

0

2

…

4

45

…

3

3

   

0

0

1

0

1

…

6

52

…

5

4

   

0

0

0

1

3

…

4

52

…

6

  1. i1 to i45: dichotomous item responses; f1 to f4: dummy variables for the test forms; pp1 to pp7: passage positions; ip1 to ip45: item positions. Only one examinee from each test form was used to demonstrate the data layout