Figure ES.2. Student Growth on Test Scores from Baseline to Follow-Up and the Associated Impact of the Enhanced Reading Program
SOURCES: MDRC calculations are from baseline and follow-up results on the Stanford Achievement Test Series, 10th ed. (SAT 10) abbreviated battery.
NOTES: The estimated impacts on follow-up results are regression-adjusted using ordinary least squares, controlling for indicators of random assignment, baseline reading total scaled score, race/ethnicity, gender, free-lunch status, age, overage for grade, single-adult household, and mother's education. Each dark bar illustrates the difference between the baseline and follow-up SAT 10 scaled scores for the enhanced program group, which is the actual growth of the enhanced group. Each light bar illustrates the difference between the baseline SAT 10 scaled score for the enhanced program group and the follow-up scaled score for the regular program group (calculated as the follow-up scaled score for the enhanced group minus the estimated impact). This represents the counterfactual growth of students in the enhanced group.
A two-tailed t-test was applied to each impact estimate. Statistical significance is indicated by (*) when the p-value is less than or equal to 5 percent.
Spring administration of the SAT 10 to fifth-graders does not include word study skills. Thus, the sample of students reporting follow-up scores on the word study skills subtest differs from the sample with baseline scores as well as from the sample with follow-up scores on the vocabulary and reading comprehension subtests, which do include fifth-graders.