A treatment effect is demonstrated in the regression-discontinuity design by:
A) A discontinuity in the regression line
B) A significant difference in the pretest and posttest scores
C) Multivariate analysis of covariance
D) The demonstration of an interaction

Question

Quizplus · Accepted Answer

In a regression-discontinuity design, a treatment effect is indicated by a discontinuity or a jump in the regression line at the cutoff point where the treatment is assigned.

A Treatment Effect Is Demonstrated in the Regression-Discontinuity Design By