Experimental evaluations that involve the educational system usually involve a hierarchical structure (students are nested within classrooms that are nested within schools, etc.). Concerns about contamination, where research subjects receive certain features of an intervention intended for subjects in a different experimental group, have often led…

Understanding and conducting research is a complex, integral skill that needs to be mastered by both undergraduate and graduate students. Yet many students are reluctant and often somewhat apprehensive about undertaking research and understanding the underlying statistical methods used to evaluate research (Dauphinee, Schau, & Stevens, 1997).…