There are six major studies of the effect of indexing depth on retrieval performance. They differ in purpose, methodology, measures, indexing language, field of study, and data base--nevertheless, all have found depth of indexing to have the same effect upon information retrieval. (13 references) (Author/NH)

The relative retrieval efficiency of the title searching technique and the index term searching technique is so close that the choice of one method or the other must be primarily on economic grounds. (9 references) (Author)

In order to compare effects of input processing on information retrieval in three databases, 25 articles from a specific journal were examined. Tables and Venn diagrams show retrieval results from different manual and computer searches. The relation between document surrogates and subject matter of the documents is discussed. (SW)

The purpose of the study was to determine how many questions judged relevant to an article are also judged relevant using different length representations of the article, and how this proportion changes as the length of the representation changes. Several persons made relevance judgments for each of a set of articles to each of a set of questions.…

Presents criteria for an effective syntagmatic relator system and describes how conceptual syntagmatic relationships are expressed in natural language, commenting on the adequacy of such expressions for document retrieval systems. Only one type of expression, a gestalt structure, represented as a frame, conforms to the criteria. (Author/JKP)

THE MAIN OBJECTIVES OF THE ANALYSES INCLUDE--(1) A RESEARCH STUDY OF TECHNIQUES FOR THE EVALUATION OF ASSOCIATIVE AND COORDINATE MESSAGE RETRIEVAL METHODS. (2) THE PREPARATION AND ANALYSIS OF MACHINE-READABLE TEST CORPORA SUITABLE FOR EXPERIMENTS WITH ASSOCIATIVE MESSAGE RETRIEVAL METHODS. THESE CORPORA CONSIST OF APPROXIMATELY 10,000 MESSAGES AND…

A new testing process is described. The design of the test procedure is covered in detail, and the several language processing features incorporated into the SMART system are individually evaluated. (20 references) (Author)

The objectives of this study were: (1) to create a set of computer programs capable of practical associative processing of NASA's growing document collection, (2) to process the collection with these programs, exhibiting the achievement of a capability to perform associative search of the collection, and (3) to study the use of statistical…

Progress is reported at the 1,000,000 word level on the development of a partial syntatic analysis technique for indexing text. A new indexing subroutine for hyphens is provided. New grammars written and programmed for Machine Aided Indexing (MAI) are discussed. (ED 069 290 is a related document) (Author)

Some of the literature concerning citation indexing is discussed with emphasis on research projects. (52 references) (Author/NH)

Designed for use with a computer-produced subject index, PRECIS assigns clerical procedures in subject heading work to computer programs. The subject headings represent a unique combination of several different characteristics, permitting several coextensive forms of a subject name for each work. Final choice amongst alternatives is made by the…

As the fourteenth report in a series describing research in automatic information storage and retrieval, this document covers work carried out on the SMART project for approximately one year (summer 1967 to summer 1968). The document is divided into four main parts: (1) SMART systems design, (2) analysis and search experiments, (3) user feedback…

Outlines the concepts and facilities of SLC-II, a basic support for R&D in automatic documentation and language translation, and gives a detailed description of its use in automatic indexing. The design and running of a full-scale pilot project is described, with a parallel experiment in the effectiveness of "thesaurus enrichment" by semiautomatic…

A uniterm keyword system is explained which is thought to be suitable for small information centers operated by a staff of one or two. (3 references) (Author)

The question is asked: Of index terms assigned to documents, which function most effectively in retrieval, the most used or popular terms, or those which are used relatively infrequently? The experiment is a retrieval experiment and uses the Cranfield-Salton data. (14 references) (Author)