We humans are faced with an interesting problem: That which we think we un derstand the most-our own behavior-we probably understand the least. On the eve of a new millennium. the planet is beset by a host of problems that are. for the most part. caused by human behavior. Ironically. although it seems that the greatest impact of our behavior is on the planet and its other inhabitants. we may actually be threatening our own future the most. For example. we have caused untold harm to the air we breathe. to the water we drink. and. by exten sion. to much of the food we eat. More important perhaps. we have created a so ciety in which. among other things. many people are anxious and depressed. young women starve themselves. and alcohol and cigarette use are responsible for hundreds of thousands of cases of illness and death every year. And humans still murder one another at an astounding rate. while at the same time continu ing to affirm the value of human life. At a time when it is critical that our chil dren become educated. more and more children are not learning the basic skills they will need to think logically so that they can begin to solve the world's problems. The question may be not "Can the planet survive?" but. rather. "Can we humans survive and change our own destructive actions?" Although many scholars. philosophers.

By the end of his long life, B. F. Skinner (1904-1990) had become one of the most influential and best known of psychologists (Gilgen, 1982; Heyduke & Fenigstein, 1984). An important feature of the approach to the study of behavior that he championed, behavior analysis, is the intensive study of individual subjects over time. This approach, which is characterized by the use of within-subject experimental designs, repeated and direct measures of behavior, and graphic analysis of data, stands in marked contrast to the research methods favored by many nonbehavioral psychologists. Skinner discussed the advantages of his approach in a number of books (e.g., Skinner, 1938, 1953, 1979), but never devoted a book to methodology. Sidman (1960) and Johnson and Pennypack (1993b) did devote books to behavior analytic research methodology. These books are of excep tionally high quality and should be read carefully by anyone interested in behavior analysis. They are sophisticated, however, and are not easy reads for most neophyte behaviorists. Introductory-level books devoted entirely to methods of applied behavior analysis (e.g., Kazdin, 1982; Barlow & Hersen, 1984) are easier to understand, but somewhat limited in coverage.

Psychology: A Behavioral Overview is an introductory text with an orienting per spective that is frankly behavioral rather than eclectic. This focus is made quite clear in the first chapter of the book, but in the remainder it also becomes clear that such a focus permits coverage of most of the topics found in the more common introductory text. Actually, the next five chapters (dealing with psy chology as a scienc~, methodology, evolution, physiology, and learning) are in many ways comparable to the treatments provided in more eclectic introductory texts. The behavioral focus and the departure from traditional approaches be come most significant in the last six chapters which deal with traditional psycho logical topics (e. g. , language, child development, and personality)-but deal with them systematically in terms of the concepts and principles introduced in the chapters on evolution and physiology, and especially in the chapter on learning. Using the concepts provided early in the text to interpret complex aspects of human behavior provides valuable justification for those concepts, as well as an opportunity for improved understanding of them. Although students will not make extensive contact with the variety of the oretical approaches found in the typical text, they will become especially compe tent in the use of behavioral concepts and principles to interpret and understand many of the topics of traditional importance in psychology.

The branch of clinical psychology known as behavior modification or, synonymously, applied behavior analysis, has grown substantially from humble beginnings in the 1960s. Many colleges and universities now offer courses in applied behavior analysis, and more than a few grant degrees in the area. Although they remain controversial, behavior mod ification procedures have been used to good advantage in dealing with a range of problem behaviors and are now rather widely employed in schools, residential institutions, and other therapeutic facilities. The two hallmarks of applied behavior analysis are utilization of the principles of operant conditioning to improve human behavior and utilization of scientific research methodology to assess the effectiveness of treatments. The present text provides an overview of several issues peculiar to applied behavior analysis research methodology. Six general areas of concern are (a) trends in applied behavior analysis research, (b) assessment and measurement issues, (c) experimental designs and strategies, (d) interpretation of findings, (e) ethical issues in applied behavior analysis, and (f) the societal impact of studies in the area. As evidenced by a sizable number of recently published articles, these topics are of considerable interest to behavior analysts. They also are relevant for students of scientific epistemology and general psychological research methods."

vii Drugs and sex are two topics about which most people have strong opinions and weak understanding. Knowledge of each can be gained in many ways, all with associated rewards and risks. Like all textbooks, this one was written in the belief that reading can foster learning. The book is intended to introduce principles of behavioral pharmacology to readers with little or no knowledge of the discipline but with an interest in how drugs affect human behavior. Gleaning anything of value from the text requires two things from the reader. The first is a willingness to accept an analysis of drug effects that shares little with folklore or common sense no tions of drug action. The second is a willingness to accept the fact that the behavioral effects of drugs are complex and depend upon a sizable number of pharmacological and behavioral variables. Unless one is aware of these factors and how they determine a drug's actions, the behavioral effects of drugs can be neither pre dicted nor meaningfully explained. If it does nothing else, this volume will make it obvious that the behavioral effects of drugs are lawful and can be predicted and understood on the basis of well-established relations between empirical phenomena. De scribing these relations and exploring how they allow behavioral ix x PREFACE pharmacologists to make sense of drug effects that are otherwise incomprehensible was a major goal in preparing the text."

We humans are faced with an interesting problem: That which we think we un derstand the most-our own behavior-we probably understand the least. On the eve of a new millennium. the planet is beset by a host of problems that are. for the most part. caused by human behavior. Ironically. although it seems that the greatest impact of our behavior is on the planet and its other inhabitants. we may actually be threatening our own future the most. For example. we have caused untold harm to the air we breathe. to the water we drink. and. by exten sion. to much of the food we eat. More important perhaps. we have created a so ciety in which. among other things. many people are anxious and depressed. young women starve themselves. and alcohol and cigarette use are responsible for hundreds of thousands of cases of illness and death every year. And humans still murder one another at an astounding rate. while at the same time continu ing to affirm the value of human life. At a time when it is critical that our chil dren become educated. more and more children are not learning the basic skills they will need to think logically so that they can begin to solve the world's problems. The question may be not "Can the planet survive?" but. rather. "Can we humans survive and change our own destructive actions?" Although many scholars. philosophers."

By the end of his long life, B. F. Skinner (1904-1990) had become one of the most influential and best known of psychologists (Gilgen, 1982; Heyduke & Fenigstein, 1984). An important feature of the approach to the study of behavior that he championed, behavior analysis, is the intensive study of individual subjects over time. This approach, which is characterized by the use of within-subject experimental designs, repeated and direct measures of behavior, and graphic analysis of data, stands in marked contrast to the research methods favored by many nonbehavioral psychologists. Skinner discussed the advantages of his approach in a number of books (e.g., Skinner, 1938, 1953, 1979), but never devoted a book to methodology. Sidman (1960) and Johnson and Pennypack (1993b) did devote books to behavior analytic research methodology. These books are of excep tionally high quality and should be read carefully by anyone interested in behavior analysis. They are sophisticated, however, and are not easy reads for most neophyte behaviorists. Introductory-level books devoted entirely to methods of applied behavior analysis (e.g., Kazdin, 1982; Barlow & Hersen, 1984) are easier to understand, but somewhat limited in coverage."