Assessing the predictive validity of the IXL Real-Time Diagnostic using Star Assessments as criterion
NA (site), NA (city), Oklahoma (OK)
From the Executive Summary: "The goal of this study was to assess the validity of IXL’s Real-Time Diagnostic in both math and reading using a new criterion measure: the Star Assessment. We analyzed math and reading data from students in grades 1-8 attending public schools in a large, suburban Oklahoma district. Within each subject, we found:
• Strong, positive correlations between IXL’s Diagnostic and Star performance (all rs = .70)
• A high degree of overlap in student proficiency classifications by the IXL Diagnostic and Star Assessment"
Citation: Schonberg, C. (2022). Assessing the predictive validity of the IXL Real-Time Diagnostic using Star Assessments as criterion. IXL Learning.
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