The three-volume APA Handbook of Research Methods in Psychology features descriptions of many techniques that psychologists and others have developed to help them pursue a shared understanding of why humans think, feel, and behave the way they do. At the broadest level, when choosing a method, researchers make decisions about what data or measurement techniques will best capture the thoughts, feelings, and behaviors that interest them; what research design best fits the question that they want to answer; and what strategies for data analysis best match the characteristics of their design and measurements. The simplest choice for organizing the presentation of material is the temporal sequence in which they will make these decisions.