This chapter will discuss the concept of correlation, which is used in later chapters that will explain the concepts of validity and reliability. Here, the authors introduce the Pearson correlation coefficient, a statistic that is used with ratio or interval-scaled data. In addition, they introduce the Spearman correlation, which is used with ranked or ordinal-scaled data.
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Type Book ChapterPub Date 11/1/2008Stock # PB229X_5