This book introduces multiple-latent variable models by utilizing path diagrams to explain the underlying relationships in the models. This approach helps less mathematically inclined students grasp the underlying relationships between path analysis, factor analysis, and structural equation modeling more easily. A few sections of the book make use of elementary matrix algebra. An appendix on the topic is provided for those who need a review. The authors maintain an informal style so as to increase the book’s accessibility. The book is not tied to a particular computer program, but special attention is paid to Mplus & Open Rx.