ERIC Number: ED235802
Record Type: Non-Journal
Publication Date: 1983-Jul-1
Reference Count: N/A
Multidimensional Mapping of Libraries Based on Shared Holdings in the OCLC Online Union Catalog. Research Report.
McGrath, William E.; Hickey, Thomas B.
This report describes the multidimensional scaling (MDS) method for interpreting collection overlap based on the number of books held by pairs of libraries in large groups (as many as 100 libraries or more). MDS results for four groups of libraries sampled from the OCLC database are also presented. MDS is described as a class of data-analytic or descriptive techniques designed to uncover the structure of a database in terms of clusters of similar objects within one or more dimensions. It is reported that (1) in the first group of libraries studied (a random sample of 60 network libraries), public and academic libraries separated in two dimensions; (2) in a random sample of 50 academic libraries, types of libraries (law, medical, college, university, and denominational) separated in two dimensions; (3) a random sample of 100 libraries without regard to type, nevertheless clustered in two dimensions by library type (university, college, public, denominational, medical, and special); and (4) a random sample of 50 public libraries had tentative clusters not yet identified. The implications of these findings are discussed for cooperative collection development, interlibrary lending, partitioning of the OCLC database by type of library, and library network relationships. A 22-item bibliography and lists of the libraries included in the study are also provided. (Author/ESR)
Publication Type: Reports - Research
Education Level: N/A
Authoring Institution: OCLC Online Computer Library Center, Inc., Dublin, OH.