In this paper, we consider what may be done when researchers anticipate that in the implementation of field experiments, random assignment to experimental and control groups is likely to be flawed. We ...

Find out more about how we test and score products.“ While the LearnPhoto365 app could use a design and customization upgrade, the random assignment generators are worth the price of the app.

To illustrate the importance of random assignment, I would like you to imagine we did not use random assignment in our study of treatment for COVID-19.

In this study, researchers examined the extent to which purposeful (nonrandom) and random assignment of students into classrooms occurs in Arizona elementary schools (Grades 3–6). Researchers found ...