**edited 17 Oct 2008 to round-off the first two columns of 5 u.**

This is the 3rd post about the Bartholomew et al. book.

## Introduction

It would be convenient if Bartholomew’s model were one we had seen before.

It is.

We got their scores and loadings just by following their instructions. Although they didn’t use matrix notation, their equations amounted to

loadings = the -weighted eigenvector matrix,

“component score coefficients” = reciprocal basis vectors,

scores = X cs.

where V is an orthogonal eigenvector matrix of the correlation matrix, is the diagonal matrix of (nonzero) , X is the standardized data.

Let’s recall Harman’s model. Read the rest of this entry »