We consider estimating the effect of a treatment on a given outcome measured on subjects tested both before and after treatment assignment in observational studies. A vast literature compares the competing approaches of modelling the post-test score conditionally on the pre-test score versus modelling the difference, namely, the gain score. Our…

Functional communication training (FCT; Carr & Durand, 1985) is frequently utilized as a treatment for socially maintained problem behavior (Tiger et al., 2008). Although FCT is a viable treatment option for the reduction of problem behavior, researchers have identified several variables related to the selection of the functional communication…

As implementation of the "Next Generation Science Standards" moves forward, there is a need for new assessments that can measure students' integrated three-dimensional science learning. The National Research Council has suggested that these assessments be multicomponent tasks that utilize a combination of item formats including…