<P> The Spearman correlation between two variables is equal to the Pearson correlation between the rank values of those two variables ; while Pearson 's correlation assesses linear relationships , Spearman 's correlation assesses monotonic relationships ( whether linear or not ) . If there are no repeated data values , a perfect Spearman correlation of + 1 or − 1 occurs when each of the variables is a perfect monotone function of the other . </P>
<P> The Spearman correlation between two variables is equal to the Pearson correlation between the rank values of those two variables ; while Pearson 's correlation assesses linear relationships , Spearman 's correlation assesses monotonic relationships ( whether linear or not ) . If there are no repeated data values , a perfect Spearman correlation of + 1 or − 1 occurs when each of the variables is a perfect monotone function of the other . </P>
the interpretation of the spearman correlation coefficient is identical to that for the
the interpretation of the spearman correlation coefficient is identical to that for the
Pearson correlation between the rank values of those two variables
Pearson correlation between the rank values of those two variables