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The key difference between experimental and observational study is that an experimental study is a study where the researcher has control over most of the variables. On the other hand, an observation study is a study where the researcher merely observes the subject without controlling any variables.
Observational research (or field research) is a type of correlational (i.e., non-experimental) research in which a researcher observes ongoing behavior.There are a variety of types of observational research, each of which has both strengths and weaknesses.These types are organized below by the extent to which an experimenter intrudes upon or controls the environment. Observational research is particularly prevalent in the social sciences and in marketing.here are a variety of types of observational research, each of which has both strengths and weaknesses. These types are organized below by the extent to which an experimenter intrudes upon or controls the environment. Observational research is particularly prevalent in the social sciences and in marketing.