Review of The vectors of mind

Abstract

Reviews the book, The vectors of mind by L. L. Thurstone (1935). Those who have followed Thurstone's development of the factor theory in the journals will be glad to have the material brought together in the present book. It embodies the fundamental equation which was developed earlier but elaborates the mathematical basis and gives improvements on the centroid method. The fundamental factor theorem that the number of linearly independent common factors in a battery of tests is the rank of their reduced correlational matrix is presented in much more detail. A brief mention of the topics developed in the book is provided in this review to give the reader some notion of the ground covered. The reviewer concludes by suggesting that every psychologist who can grasp the mathematics should read the book. (PsycInfo Database Record (c) 2025 APA, all rights reserved)