Survey research is a commonly used method of collecting information about a population of interest.There are many different types of surveys, several ways to administer them, and many methods of sampling.There are two key features of survey research: One of the primary strengths of sampling is that accurate estimates of a population's characteristics can be obtained by surveying a small proportion of the population.
Instead, researchers will randomly select geographic areas (for example, counties), then randomly select households within these areas.This creates a cluster sample, in which respondents are clustered together geographically.For example, a researcher may want to compare survey responses of African-Americans and Caucasians.To ensure that there are enough Afrian-Americans in the survey, the researcher will first identify the African-Americans in the population and then randomly select a sample of African-Americans.Glossary terms related to sampling procedures: Convenience Sampling Oversampling Probability Sampling Purposive Sampling Quota Sampling Random Sampling Random Selection Representativeness Sample Sample Size Sampling Sampling Design Sampling Frame Snowball Sampling Stratification Stratified Sampling Measurement error is the difference between the target population's characteristics and the measurement of these characteristics in a survey.
There are two types of measurement error: systematic error and random error.
For example, a researcher may administer a survey about marital happiness.
However, some respondents may have had a fight with their spouse the evening prior to the survey, while other respondents' spouses may have cooked the respondent's favorite meal.
The survey responses will be affected by the random day on which the respondents were chosen to participate in the study.
With random error, the positive and negative influences on the survey measure balance out.
Visit the following website for more information about measurement error: It is absolutely imperative that researchers keep respondents' identities confidential.