Research report

Calibration of Spanish MAP Growth math tests

June 2020

By: Shudong Wang, Xueming (Sylvia) Li


This document presents the results of a calibration study conducted to investigate the possible consequences of replacing the English MAP Growth Math item parameters with the Spanish math item parameters from calibrating Spanish items using empirical data. Spanish math items currently have the same item parameters as their English counterparts, but calibrating the Spanish instead using empirical student data will result in a more reliable and valid assessment. The final calibration results are based on monolingual data only (i.e., Spanish test responses), but bilingual results are also used as references.

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