"In the pages of this handbook, you will find 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. These are the tools that we use to conduct our rational analyses. At the broadest level, when choosing a method you make decisions about (a) what data or measurement techniques will best capture the thoughts, feelings, and behaviors that interest you; (b) what research design best fits the question that you want to answer; and (c) what strategies for data analysis best match the characteristics of your design and measurements. The simplest choice for organizing the presentation of material is the temporal sequence in which you will make these decisions. This is roughly what we have done. In Volume 2, interpretive research designs that emphasize a qualitative approach are detailed in Part I. Volume 2, Parts II through VI, introduces designs that emphasize an etic (or theory-specified), more quantitative approach to research. In Volume 2, Part V, designs are introduced that focus on theory-testing questions, rely heavily on quantification, and are used to study change in individual units. The designs in Volume 2, Part VI, are labeled "Neuropsychology" and "Biological Psychology." Here you will find designs for theory-driven research that derive largely from the more biological end of psychology's family tree"--Book. (PsycINFO Database Record (c) 2013 APA, all rights reserved).