Noncompliance to treatment assignment is widespread in randomized trials and presents challenges in causal inference. In the presence of noncompliance, the most commonly estimated effect of treatment assignment, also known as the intent-to-treat (ITT) effect, is biased. Of interest in this setting is the complier average causal effect (CACE), the…

Coaching has become a prominent professional development tool for helping early childhood teachers implement curriculum and research-based practices in their classrooms. One of the coaching strategies found to create positive changes in teacher practice and child outcomes is building trust between the coach and teacher(s). Despite what is known in…

The purpose of this study is to investigate the nature of the relationship between problem-framing and reported engagement with external research evidence in school-based decision-making. This study serves as an important first attempt to explore and describe this potential relationship and its implications for the use of research in schools.…

Although mathematics development research has become more prominent in the school psychology literature in recent years, a large research gap in this area exists regarding English language learners (ELLs). Significant research in education, cognitive science, and psychology has been devoted to understanding the links between language and…

In this thesis, I present three related papers that collectively investigate the instructional supports on screen and in the media viewing context that influenced English and heritage language vocabulary knowledge in DLLs. In study 1, I examine how specific pedagogical approaches used in educational media might benefit DLLs. In study 2, I…

In basic regression discontinuity (RD) designs, causal inference is limited to the local area near a single cutoff. To strengthen the generality of the RD treatment estimate, a design with multiple cutoffs along the assignment variable continuum can be applied. The availability of multiple cutoffs allows estimation of a pooled average treatment…

Changes in school environments are sources of instability and stress for children. The social, educational, residential, and familial changes that usually accompany school changes are likely to exacerbate this stress and negatively impact academic performance. The full range of these changes that occur with school changes, and their relative…

Attention deficit disorders are among the most prevalent and widely studied of all psychiatric disorders. The National Center for Health Statistics reports that 9.0% of children (12.3% of boys and 5.5% of girls) between ages 5 to 17 have been diagnosed with ADHD. Research consistently demonstrates that attention deficits have a deleterious effect…