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Evaluation of the DC Opportunity Scholarship Program: Impacts After Two Years

NCES 2009-4023
June 2008


Table 5.  Year 2 Impact Estimates of the Offer of a Scholarship on the Full Sample: Parent and Student Reports of Satisfaction with Their School (ITT)
 
Treatment Group Mean Control Group Mean Difference
(Estimated Impact)
Outcome Effect Size p-value
Parents who gave school a           
grade of A or B  .76 .63 .13** .26 .00
Average grade parent gave           
school (5.0 scale)  4.02 3.73 .29** .29 .00
School satisfaction scale  26.12 23.44 2.67** .33 .00
Students who gave school a           
grade of A or B  .71 .68 .03 .05 .49
Average grade student gave           
school (5.0 scale)  3.97 3.84 .13 .12 .14
School satisfaction scale  34.12 33.24 .88 .13 .10
**Statistically significant at the 99 percent confidence level.
NOTES: Means are regression-adjusted using a consistent set of baseline covariates. Effect sizes are displayed in terms of standard deviations of the study control group distribution. Valid N for parent measure of school grade = 1,549; parent satisfaction = 1,571. Parent survey weights were used. Parent school satisfaction scale was IRT scored and had a range of .96 to 35.43. Valid N for student measure of school grade = 974; student satisfaction = 1,042. Student survey weights were used. School satisfaction scale was IRT scored and had a range of 9.67 to 46.89. Impact estimates reported for the dichotomous variable “parents who gave school a grade of A or B” are reported as marginal effects.