What approaches could have yielded additional valuable information?

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Additional research methods that could have been used to yield additional valuable information include focus groups, surveys, interviews, and secondary research. Focus groups involve gathering a small group of people together to discuss a particular topic or issue while being observed by researchers in order to gain insights into behaviors and opinions. Surveys are another useful data collection method which involve asking a predetermined set of questions to a large sample size of participants in order to obtain generalizable results. Interviews can also be helpful for gaining qualitative insights from individuals about their experiences with certain topics or issues. Finally, secondary research involves utilizing existing data sources such as books, articles, media reports, etc., in order to gain an understanding of the current state of the market or industry you are researching. By using multiple methods when conducting research it is possible to obtain comprehensive and accurate results that can inform decision making processes.