2. Designs and Reliability Assessing Student Learning Section 4.2

3. Designs and Reliability DecisionTest Absolute Relative Norm Referenced Criterion Referenced

4. Designs and Reliability Design Reliability as Multiple Administration Consistency Reliability as Internal Consistency Common Design and Reliability Calculations for Norm-Referenced Tests ( Relative Decisions) Alternate forms Test-retest “Raw” coefficient alpha Name Reliability Calculations Component Relationships Testing Occasions Total scores Item to total scores OneTwo Identical mean observed scores; measuring the same construct; etc. X X XX X X Correlation of total scores Cronbach alpha

5. Designs and Reliability TEST BTEST A A C B TEST B $ % @ =?=?

6. Designs and Reliability TEST B A C B TEST A A C B = 12 A B C X X TEST B A B C X X X TEST

7. Designs and Reliability

8. Data from only one administration of the test Reliability is calculated on item level responses in association with total scores Operate with raw scores

9. Cronbach Designs and Reliability http://www.ssicentral.com/irt/student.html

10. What’s next?