Understanding Correlation Matrices

"Correlation matrices (along with their unstandardized counterparts, covariance matrices) underlie much of the statistical machinery in common use today. A correlation matrix is more than a matrix filled with correlation coefficients. The value of one coefficient in the matrix puts constraints on the values of the others, and this is a major theme of the volume. The volume is written accessibly, and key points are illustrated with a wide range of lively examples, including correlations between intelligence measured at different ages through adolescence; correlations between public health…