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A correlation matrix can present the relationships among several variables. For example, a study by McCabe and colleagues used a correlation matrix to show relationships between working memory and other cognitive variables. The matrix revealed an extremely strong correlation ($$.96$$) between working memory and executive function, a medium correlation ($$.27$$) between working memory and vocabulary, and showed that all measures except vocabulary tend to decline with age.

Example of a Correlation Matrix

In a study by McCabe and colleagues, the correlation matrix revealed an extremely strong correlation of ____ between working memory and executive function.

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