title: Online tables of contents for books: effect on usage.
abstract: OBJECTIVE
  To explore whether the presence of online tables of contents (TOC) in an online catalog affects circulation (checkouts and inhouse usage). Two major questions were posed: (1) did the presence of online tables of contents for books increase use, and, (2) if it did, what factors might cause the increase?
  
  
  METHODS
  A randomized and stratified design was used in tracking usage of 3,957 book titles that were previously divided into two groups: one with TOC and one without TOC. Stratification was done for year of imprint, location, subject, previous use, circulating or non-circulating status, and presence of TOC. The use was tracked by the online catalog statistics in the InnoPac online catalog for fourteen months.
  
  
  RESULTS
  The study found that tables of contents do increase usage. It also showed a correlation in the size of the effect based on the currency of the titles. In general, even after adjusting for all of the variables (publication date, location, circulation status, subject, and previous use), the odds of a title being used increased by 45% if the titles had online tables of contents, a statistically significant impact at the 0.05 level.
  
  
  CONCLUSIONS
  This case-control study presents new information about the impact on circulation and inhouse use when tables of contents for books are added to the online catalog record. The study helps to establish the positive role of tables of contents in online catalogs. The research establishes TOC as a major parameter that can be successfully studied using quantitative methods. The study also provides information professionals with some guidance on when enhancement of TOC is likely to be most effective in increasing the use of existing collections.
authors.affiliation: Health Sciences Center Library, University of New Mexico, Albuquerque 87131-5686, USA.
authors.forename: R C
authors.initials: RC
authors.lastname: Morris
mesh_terms: D000046:Academic Medical Centers; D001867:Book Classification / Q000379:methods*; D002381:Catalogs, Library; D007993:Libraries, Medical / Q000458:organization & administration / Q000706:statistics & numerical data*; D018966:Library Materials / Q000706:statistics & numerical data* / Q000600:supply & distribution; D008001:Library Technical Services; D016015:Logistic Models; D009516:New Mexico; D009862:Online Systems; D009936:Organizational Innovation; D011897:Random Allocation; D012107:Research Design