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  • This type of research approach is known as archival research.
  • Some researchers gain access to large amounts of data without interacting with a single research participant.
  • Archival research relies on looking at past records or data sets to look for interesting patterns or relationships.
  • Instead, they use existing records to answer various research questions.

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  • In addition, they also require a substantial financial investment.
  • As with any research strategy, longitudinal research is not without limitations.
  • Many researchers are unable to commit the resources necessary to see a longitudinal project through to the end.
  • For one, these studies require an incredible time investment by the researcher and research participants, and given the nature of longitudinal studies, the results may not be known for years, if not decades.