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 ATI Home >> Galileo K‑12 Online >> Item Response Theory Sets Galileo K-12 Apart 

 


Galileo K-12 Online

Item Response Theory Sets Galileo K-12 Apart

Item Response Theory (IRT), a statistical analysis procedure, is one of the research-based tools ATI uses to address assessment goals and assessment characteristics associated with standards-based education. For example, IRT makes it possible to place scores from different assessments on a common scale. IRT considers both item difficulty and achievement level making it possible to produce an ability score and to measure academic progress. This cannot be accomplished by assessments that provide only raw data (percent/number correct). Additionally, IRT techniques are important in determining item parameter estimates and assessment reliability. Access to assessment relevant statistical information is available through the Galileo K-12 Online Item Analysis and Item Parameter Reports.

 

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