In this paper the authors present a new method for sample selection for scale-up experiments. This method uses propensity score matching methods to create a sample that is similar in composition to a well-defined generalization population. The method they present is flexible and practical in the sense that it identifies units to be targeted for…

Calculating and reporting appropriate measures of effect size are becoming standard practice in psychological research. One of the most common scenarios encountered involves the comparison of 2 groups, which includes research designs that are experimental (e.g., random assignment to treatment vs. placebo conditions) and nonexperimental (e.g.,…

High-probability requests were provided to two boys (age seven) with behavior disorders and severe disabilities as an antecedent to delivering a low-probability request. Results showed an immediate increase in appropriate responding when the intervention was delivered. Generalized responding and response maintenance were also exhibited.…