From the abstract: "The Early Childhood Environment Rating Scales, including the Early Childhood Environment Rating Scale–Revised (Harms et al., 2005) and the Early Childhood Environment Rating Scale, Third Edition (Harms et al., 2015) are the most widely used observational assessments in early childhood learning environments. The most recent version of the scale addresses some of the criticisms in the research literature, particularly related to the organization of the scale and the standard scoring procedures. In the current study, we explore the relationship between the two scales. Specifically, we evaluated the correlations between the Early Childhood Environment Rating Scale–Revised and the Early Childhood Environment Rating Scale, Third Edition, as well as the differences between the overall scores, individual items, and subscales. Implications for practice and future research are also provided."