Discusses sources of available data on reference questions asked and answered in public libraries, and analyzes data collected between 1970 and 1985 in nine states. National data from libraries in the United States, Canada, and Great Britain are also presented. (Author/MES)

Based on the concept that library use measurement should have as its basic starting point the individual patron, a method of data collection and analysis has been developed that explores individual patterns of borrowing over time. The method accounts for the number of visits on which borrowing takes place, number of items borrowed per visit, and…

Describes the research objectives, rationale, methodology, and findings of a model program developed at the Northwestern University Library, which examined whether online catalogs require instruction and, if so, how that instruction would be best delivered. (CLB)

Discusses issues relating to the reliability, validity, utility, and information value of unobtrusive testing of library reference services; provides suggestions for practical applications of these criteria; applies study findings to library decision making and planning; and identifies topics for further methodological refinement. (Author/CLB)