PAI: Automatic Indexing for Extracting Asserted Keywords from a Document

Naohiro Matsumura, Yukio Ohsawa, and Mitsuru Ishizuka

This paper proposes an automatic indexing method called PAI (Priming Activation Indexing) that extracts keywords representing the author’s main point from a document based on the priming effect in cognitive process. The basic idea of PAI is that since an author writes a document emphasizing his/her main point, impressive terms born in the mind of the reader could represent the asserted keywords. PAI employs a spreading activation model without using corpus, thesaurus, syntactic analysis, dependency relations between terms, or any other knowledge except for stop-word list. Experimental evaluations are reported by applying PAI to journal/ conference papers.


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