This article examines the risk of crossover contamination in individual-level randomization, a common concern in experimental research, in the context of a large-enrollment college course. While individual-level randomization is more efficient for assessing program effectiveness, it also increases the potential for control group students to cross…

This article describes a usability evaluation that was conducted among student users of improved learning areas (sites) designed as part of the WebLearn Improved Student Experience (WISE) project conducted at Oxford University (UK). WebLearn is the university's internal brand for the Sakai open source virtual learning environment (VLE). The…

In the 2020-2021 school year, many schools and districts around the country implemented routine COVID-19 testing to proactively detect cases among teachers, students, and staff and stop the spread of the virus. Such testing made it possible for many communities to gain the needed support from teachers and parents to reopen schools and resume…

In this study, we propose that the unique needs and characteristics of linguistic minorities should be considered throughout the test development process. Unlike most measurement invariance investigations in the assessment of linguistic minorities, which typically are conducted after test administration, we propose strategies that focus on the…

While many researchers have studied the relationship of socioeconomic status (SES) to adult learners' English language proficiency levels, little is known about this relationship for young learners (i.e., teenagers). In this study, we investigated the degree to which access to English language learning, as reflected by learners' SES, is associated…