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Which elicitation technique records an expert thinking aloud?

  • A.Structured interview
  • B.Card sorting, in which the expert groups written cases and explains the basis of grouping
  • C.Protocol analysis
  • D.The repertory grid, which asks the expert to compare cases and name the distinctions used

Answer: C

Protocol analysis captures the expert's running commentary while solving a real case and then codes it into rules, which surfaces knowledge an interview would miss because the expert never thinks to mention it. Repertory grids, interviews and card sorting elicit different aspects. The methods are complementary, and a serious acquisition effort uses several rather than relying on any one of them. A limit that survives making every external component ideal is an intrinsic one, and worth knowing for that reason.

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