Modern factor analysis is the outgrowth of Spearman's original "2-factor" model of intelligence, according to which a mental test score is regarded as the sum of a general factor and a specificâ€¦ (More)

When a model is fitted to data in a 2p contingency table many cells are likely to have very small expected frequencies. This sparseness invalidates the usual approximation to the distribution of theâ€¦ (More)

Spearmanâ€™s1 basic idea was that the mutual correlation of variables (such as test scores) might be explained by their common dependence on a latent variable, which he called a factor. Such factorsâ€¦ (More)

The indeterminacy of factor scores has been a perennial source of debate since the time of Spearman. The main purpose of this paper is to show that, in spite of his inadequate tools and concepts, Sirâ€¦ (More)

To find he precursor of contemporary latent variable modelling one must go back to the beginning of the 20th century and Charles Spearmanâ€™s invention of factor analysis. This was followed, half aâ€¦ (More)