Explain two distinctions between a general field survey and specific case study
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Case studies are a prospective or retrospective deep dive into a single case, used a lot in business, education, and perhaps also law, medicine (more often retrospective) or other fields. Experimental research involves comparisons of variables under manipulated conditions. It is always prospective and used most often in science but also in education, medicine or other fields. It involves testing a hypothesis with the scientific method and rejecting or failing to reject the hypothesis. Action research is used in education and involves observation conducted during active implementation of a program. It may be used in the social sciences also. Conditions are not manipulated, but it is also prospective. Survey research sounds to me like market research. Market research involves probing opinions using surveys but also focus groups prospectively to help create or test products to refine them or their marketing to sell them better. Surveys are also used in other types of research, including clinical, social science, education and experimental research, depending on the field of study and question.
Case studies are a prospective or retrospective deep dive into a single case, used a lot in business, education, and perhaps also law, medicine (more often retrospective) or other fields. Experimental research involves comparisons of variables under manipulated conditions.