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 specific factor. As early as 1914, Godfrey Thomson realized that the data did not require this interpretation and he demonstrated this by proposing what became…

This volume contains 10 reports of research designed to study the mind of the child and the effects of sequence and process of learning on elementary school children and their writing. Specific purposes, procedures, conclusions, and needed further research are indicated for three studies on the process of written composition, four studies on…