By Howard D. White
For reasons of accreditation, source sharing, and institutional undertaking, librarians have to verify the strengths in their collections specifically topic parts. This publication describes and illustrates a quick try out for picking out a library's assortment energy. although such checks are normally hired in educational libraries, the technique defined by way of the writer may be worthwhile to all kinds of libraries in assessing the energy in their holdings.In a time of accelerating fabric and constrained assets, libraries must be fairly sensible in identifying which goes to procure. normally, a library seeks to strengthen powerful holdings in a single or extra topic parts. Such an technique is mainly important for libraries that proportion their assets with different associations. to plot their acquisitions rigorously and to be of maximum use to different consortia individuals, a library must gauge the energy of its holdings accurately.This quantity describes and illustrates a comparatively short try out to assign libraries a ranking for current assortment power in a subject matter region. Drawing upon professional human judgment and holdings information on hand from OCLC, the attempt may also help librarians in atmosphere and verifying assortment degrees at the RLG or WLN Conspectus scales. assortment energy is frequently tested in a labor-intensive type. The short attempt offered by way of the writer is a cheap substitute to the extra commonplace labor-intensive method of assortment research.
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Additional resources for Brief Tests of Collection Strength: A Methodology for All Types of Libraries (Contributions in Librarianship and Information Science)
Thus, a verification study may suggest that a library should claim a Level 1 or 2 because it has a relatively low percentage of items suitable for Level 4. This seems a needlessly indirect way of establishing a level, and it raises questions about the validity of the study. Checking the List Participants must check the list against their holdings. Whether they do this manually or by computer (in the Research Library Information Network, OCLC, or a local online public access catalog), the task is formidable and onerous.
Its levels are broad and vague, not neat, sharp gradations. —that determine whether a level can be claimed. Obviously, we are at some distance from the Guttman scales of the textbooks and moving toward some region of fuzzy set theory. The development of strict Guttman scales poses well-known problems (Gorden, 1977; Mclver and Carmines, 1981). I have taken a heterodox approach because, unlike Guttman, I am not concerned with strict unidimensionality, at this stage at least. Nevertheless, I think theoretical considerations of scale creation such as his, long familiar to social scientists and psychometricians, should inform developmental work.
The Logic of the Test 37 CUMULATIVENESS AND LEVELS If the scale is cumulative, an exemplary library should have a coverage pattern that is strong at all levels. For example, if a library has sufficient titles to support advanced research, it should also have sufficient titles to support instructional and basic reference activities. More particularly, if the library exceeds a threshold at a given level—say, 50 percent or 5 out of 10 items—it should do at least as well at all lower levels. 1. The similarity of this measure to a Guttman scale is explored in the next section.
Brief Tests of Collection Strength: A Methodology for All Types of Libraries (Contributions in Librarianship and Information Science) by Howard D. White