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International Journal of STEM Education

Table 3 BARSTL person and item reliability values

From: Challenging instructors to change: a mixed methods investigation on the effects of material development on the pedagogical beliefs of geoscience instructors

 

Pre-development

Post-development

 

Person

Item

Person

Item

Separation index

1.90

3.11

5.03

3.46

Reliability

0.78

0.91

0.86

0.92

  1. Values of reliability and separation indices calculated using Winsteps software for the pre- and post-development BARSTL surveys
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