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Psychology and Life When you begin your introductory course in psychology, you may be quite pleasantly surprised by the wideranging terrain of contemporary psychology. Psychology and Life will reveal the intricacies of your human experience through rigorous research. Psychology and Life will lead you from the inner spaces of brain and mind to the outer dimensions of human behavior. We will investigate the processes that provide meaningful structure to your experiences, such as how you perceive the world, municate, learn, think, and remember. We will try to understand the more dramatic expressions of human nature, such as how and why people dream, fall in love, act aggressively, and bee mentally ill. Finally, we will demonstrate how psychological knowledge can be used to understand and change cultural forces at work in our lives. As authors of Psychology and Life, we believe in the power of psychological expertise. The appeal of psychology has grown personally for us over our careers as educators and researchers. In recent years, there has been a virtual explosion of new information about the basic mechanisms that govern mental and behavioral processes. As new ideas replace or modify old ideas, we are continually intrigued and challenged by the many fascinating pieces of the puzzle of human nature. Foremost in the journey will be a scientific quest or understanding. We shall inquire about the how, what, when, and why of human behavior and about the causes and consequences of behaviors you observe in yourself, in other people, and in animals. We will explain why you think, feel, and behave as you do. What makes you uniquely different from all other people? Yet why do you often behave so much like others? Are you molded by heredity, or are you shaped more by personal experiences? How an aggression and altruism, love and hate, and madness and creativity exist side by side in this plex creaturethe human animal? To appreciate the uniqueness and unity of psychology, you must consider the way psychologists define the field and the goals they bring to their research and applications. By the end of the book, we will encourage you to think like a psychologist. In this first section, we’ll give you a strong idea of what that might mean. Many psychologists seek answers to this fundamental question: what is human nature? Psychology answers this question by looking at processes that occur within individuals as well as forces that arise within the physical and social environment. In this light, we formally define psychology as the scientific study of the behavior of individuals and their mental processes. Let’s explore the critical parts of this definition: scientific, behavior, individual, and mental. The scientific aspect of psychology requires that psychological conclusions be based on evidence collected according to the principles of the scientific method. The scientific method consists of a set of orderly steps used to analyze and solve problems. This method uses objectively collected information as the factual basis for drawing conclusions. We will elaborate on the features of the scientific method more fully in Chapter 2, when we consider how psychologists conduct their research. Behavior is the means by which organisms adjust to their environment. Behavior is action. The subject matter of psychology largely consists of the observable behavior of humans and other species of animals. Smiling, crying, running, hitting, talking, and touching are some obvious examples of behavior you can observe. Psychologists examine what the individual does and how the individual goes about doing it within a given behavioral setting and in the broader social or cultural context. The subject of psychological analysis is most often an individuala newborn infant, a teenage athlete, a college student adjusting to life in a dormitory, a man facing a midlife career change, or a woman coping with the stress of her husband’s deterioration from Alzheimer’s disease. However, the subject might also be a chimpanzee learning to use symbols to municate, a white rat navigating a maze, or a sea