The i-Ready Diagnostic is backed by extensive validity research and consistently achieves industry-leading results when studied alongside rigorous assessments. Most recently, independent research showed i-Ready Diagnostic to be highly correlated with, and an accurate predictor of results for the Smarter Balanced, PARCC, and other Common Core state assessments.
The Educational Research Institute of America conducted a research study evaluating the relationship between i-Ready Diagnostic and the 2015 New York State Common Core end-of-year assessments. The research found a high correlation between i-Ready Diagnostic and the New York State Common Core Assessments. i-Ready was also shown to accurately predict end-of-year proficiency rates based on students' fall, winter, and spring Diagnostic performance.
2015 Correlations between Spring i-Ready Diagnostic and the New York State Common Core Assessments
The strong correlations between the spring i-Ready Diagnostic and the 2015 New York State Common Core Assessments—with overall correlations of 0.85 for ELA and 0.86 for Mathematics for all students across grades 3–8—far surpass the 0.70 standard set by the National Center for Response to Intervention (NCRTI) for screening tools.
Comparison of predicted and observed proficiency rates for 2015 New York Common Core Assessments
Curriculum Associates partnered with leading academics to develop a regression-based model for predicting Common Core proficiency rates. i-Ready proficiency prediction from fall, winter, and spring Diagnostic results proved to be highly accurate.