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...

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...