Survey research has become very popular these days as a scientific method of discovering relevant impact and inter-relations of social and psychological variables from given populations.
Survey research studies large and small populations by selecting and studying samples chosen from the populations to discover the relative incidence, distribution and inter-relations of sociological and psychological variables.
Populations may be small or large and the survey research can work well by resorting to sampling practices. If survey research is also called as sample survey research, it will not be inappropriate. Survey research as a matter of fact has developed as a research activity along with the development of sampling theory and its diverse procedures.