The concept of relevance is studied in many different fields, including cognitive sciences, logic, and library and information science. Most fundamentally, however, it is studied in epistemology (the theory of knowledge). Different theories of knowledge have different implications for what is considered relevant and these fundamental views have implications for all other fields as well.
“Something (A) is relevant to a task (T) if it increases the likelihood of accomplishing the goal (G), which is implied by T.” (Hjørland & Sejer Christensen,2002).
A thing might be relevant, a document or a piece of information may be relevant. The basic understanding of relevance does not depend on whether we speak of “things” or “information”.
If you believe that schizophrenia is caused by bad communication between mother and child, then family interaction studies become relevant. If, on the other hand, you subscribe to a genetic theory of relevance then the study of genes becomes relevant. If you…