Book excerpt: Introduction to Psychology for Medical Students deals with general psychology aimed for medical undergraduate students. The book discusses psychology and its relevance to medicine, particularly on the relation of the mind and the treatment of physical diseases. The authors explain perceiving and imagining; and how perception is dependent on past experience or learning, and the effects of motivation and of mood on perception. The authors also discuss abstract and concrete thinking, emotional use of words, unconscious thinking, creative thinking, learning, and remembering. The unconscious process of forgetting of unwelcome memories is repression, while consciously trying to forget them is suppression. The authors also explain normal conflict, frustration, and reaction to stress including the physical aspects of emotions causing increases in blood pressure, in adrenaline flow, or in blood glucose level. The authors also discuss the hypnotic states, individual susceptibility, the induction of hypnotic states, and their clinical applications. This book is intended for medical undergraduate students, as well as to general readers interested in psychology and human behavior.