This document discusses research methods for explaining consumer behavior. It covers three main areas: (1) determining which consumers to research, through segmentation, positioning and targeting; (2) methodological approaches including quantitative and qualitative data from primary and secondary sources using techniques like surveys, interviews and experiments; (3) research instruments like questionnaires with closed and open-ended questions in various scaling formats to collect data. The goal is to help marketers understand consumer motivations, opinions and decision-making to better meet their needs.