Item Reliability Report

This is also known as the Kuder Richardson 20 (KR20). This report measures the test reliability of inter-item (question) consistency.

Access to this option is only available if you have been granted the following sub User Permission of the Manage Reports User Permission: Execute Item Reliability. See Report Builder User Permissions for instructions on granting or denying this permission.

On the ControlPanel:

1. Click   on the Reports menu to expand it.
2. Click Report Builder.
3. Click next to Assessments/Surveys to expand the list.
4. Click Item Reliability.
5. Select one of the following from the Assessment Type drop-down list:

• Assessment
• Survey/Evaluation
• Appraisal

6. Click Select Test Instances.
7. Select either Containing or Beginning With.
8. Type a portion of the Instance name in the text field.
9. Select the number of instances to Display on the page.
10. Click Search.
11. Click the check boxes next to the instances you want to include in the report.
12. Click Return Selected.
13. Click Build Report.

Formula Used to Build This Report:

KR=(n/n-1) * (V-SUM (pi qi)/V)

• KR - Kuder Richardson 20
• N - Number of items in the test
• V - Variance of the raw scores or standard deviation squared
• pi - proportion of correct answers of question i, or (number of correct answers/total number of responses)
• qi - Proportion of incorrect answers of questions i, or (i-p)

Item Reliability Score Report Descriptions

Related Topics

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