Research report
An investigation of item parameter invariance using focused calibration samples for MAP Growth
November 2021
Description
Two studies were conducted to evaluate whether the existing MAP Growth item parameter estimates are invariant across different calibration samples. Study 1 explored the degree to which on-grade only item parameter estimates were comparable to their original all-grade counterparts. Study 2 explored the degree to which item parameter estimates using responses from the target grade plus the adjacent grades were comparable to their on-grade and all-grade counterparts.
See MoreTopics: Computer adaptive testing
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