The document discusses research design and different types of research designs including exploratory, descriptive, and causal research designs. It provides details on each type of design, their purposes, appropriate research questions to address, and common methods used. Exploratory research aims to gain background information and define problems, descriptive research describes phenomena, and causal research determines causality between variables. The document also discusses important considerations for research design such as defining constructs, developing operational definitions, specifying objectives, and controlling for extraneous variables.