William R Johnston

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An abundance of research suggests that effective school leaders are vital to promoting student outcomes in schools across the United States. Recognizing this, many state and local education agencies are motivated to develop a strong corps of highly qualified principals and assistant principals. Although a lot of emphasis is placed on recruitment and(More)
Population health scientists increasingly study how contextual-level attributes affect individual health. A major challenge in this domain relates to measurement, i.e., how best to measure and create variables that capture characteristics of individuals and their embedded contexts. This paper presents an illustration of multilevel factor analysis (MLFA), an(More)
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