The source is an excerpt from "Words That Change Minds," by Shelle Rose Charvet, which explains the "LAB Profile®," a framework for understanding people's motivations and behavior. The book presents a series of questions designed to reveal an individual's motivational patterns and productivity patterns, and it argues that understanding these patterns can improve communication, influence others more effectively, and build high-performing teams. The text also offers insights on using the LAB Profile® to overcome communication challenges, manage stress, and even predict behavior.