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Table 2 Dimensionality output

From: Reading comprehension test fairness across gender and mode of learning: insights from IRT-based differential item functioning analysis

 

Empirical

  

Modeled

Total raw variance in observations

36.6

100.0%

 

100.0%

Raw variance explained by measures

6.6

17.9%

 

17.7%

Raw variance explained by persons

2

5.5%

 

5.5%

Raw Variance explained by items

4.5

12.4%

 

12.2%

Raw unexplained variance (total)

30.0

82.1%

100.0%

82.3%

Unexplained variance in 1st contrast

2.1

5.6%

6.9%

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