Skip to main content
Asia-Pacific Science Education

Table 3 Correlations between Rasch student ability estimates for the LPDI items by tier and content

From: Is it harder to know or to reason? Analyzing two-tier science assessment items using the Rasch measurement model

Dimension

 

( A )

( B )

( C )

Tier 1 × Light Propagation

( A )

   

Tier 1 × Visibility

( B )

0.55

  

Tier 2 × Light Propagation

( C )

0.72

0.42

 

Tier 2 × Visibility

( D )

0.56

0.92

0.44

  1. Note. The correlations shown are between the estimates of students’ ability for the respective combination of tier and content
Back to article page