Mixed-effects models are an analytic technique for modeling repeated measurement or nested data. This paper explains the logic of mixed-effects modeling and describes two examples of mixed-effects analyses using R. The intended audience of the paper is psychologists who specialize in cognitive development research. Therefore, the concepts and…

Every year brings new research studies that aim to describe early childhood development. Despite this boom in research, there has been little useful translation of these studies into clear recommendations for educators and mental health practitioners. This book shows experienced educators and mental health practitioners who work with young…

This book presents the results and implications of a major new national study exploring the effects of institutional racial composition on African American students' development and their educational outcomes, taking into account individuals' background characteristics, their perceptions of the institutional environment, and their experiences in…