Discussion
'Cranfield Studies' are associated with .................
Answer: C
The Cranfield studies are associated with experimental research.
The Cranfield experiments, led by Cyril Cleverdon at the College of Aeronautics, Cranfield, between 1957 and 1966, compared indexing languages under controlled conditions: the same documents and test queries were run through different systems, and the results were measured by recall and precision. That controlled comparison is the defining feature of experimental research.
They were not a case study of one institution, not historical research into the past, and not a survey of users' opinions, though their measures are still used in evaluating retrieval systems.
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