Biomedical subjects
Publications and source records attributed to M M Eichhorn.
In the report "Attention-related increases in cortical responsivity dissociated from the contingent negative variation" by M. W. Donald, Jr., and W. R. Goff [172, 1163 (1971)] line 12 of reference 20 should read "P300 and CNV with performance efficiency."
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In response to the information needs of scientists and physicians who work in the field of vision, we have developed a direct-access, on-line specialized information retrieval system which combines computer-assisted instruction and bibliographic retrieval. An essential feature of the system is its accessibility via remote computer terminal. The key to the data base is a thesaurus which contains specific terminology arranged in a hierarchical structure. The thesaurus is used both for indexing the literature and for retrieving the information stored in the computer. Courses of instruction on selected subjects in ophthalmology have been programmed and form part of the data base. A search of the literature retrieval system by single subject, or by a combination of several subjects chosen from the thesaurus, retrieves the appropriate bibliographic citations. The response to the service offered by the Vision Information Center indicates that the center should expand its facilities to satisfy the needs of its clients.
A thesaurus has been developed to serve as the integrating unit for the computerized information storage and retrieval system of the Vision Information Center. The Center maintains records of information in the visual sciences which are available to the user in the forms of computer-assisted instruction, literature retrieval, and patient records. The numerical coding system used in the thesaurus permits seven levels of specificity; this specificity is required for depth of indexing, as well as to limit the retrieval to those bibliographic citations which are relevant to a highly specific search request. The flexible design of the thesaurus facilitates frequent revision and addition of new terminology.
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