The purpose of the current project is to explore the use of propensity scores to estimate the effects of interventions within randomized control trials, accounting for varying levels of implementation or fidelity. This work extends that of Jo and Stuart (2009) to settings with multiple or continuous measures of implementation. Rather than focus…

Rigorous research provides information that will allow ECE (Early Childhood Educator) programs to select interventions that have a scientifically based track record of effectiveness in increasing teachers' skills and teaching quality. This paper shares implementation and impact results as well as the lessons learned in conducting an evaluation of…

Infant intelligence from birth until the age of two was measured to determine the usefulness of infant intelligence tests. Twenty infants were tested regularly over the two-year period. Results showed neither simplex nor other long-term patterns of interrelationship among the infant intelligence scores obtained. The study concludes that the…