In this book, Gilbreth defines "the psychology of management" as "the effect of the mind that is directing work upon that work which is directed, and the effect of this undirected and directed work upon the mind of the worker."
In this book, Gilbreth defines "the psychology of management" as "the influence exerted by the mind controlling work upon that work being directed, and the impact of this uncontrolled and controlled work on the worker's mindset."