Discovery or Displacement? A Large-Scale Longitudinal Study of the Effect of Discovery Systems on Online

Journal Usage

OUP LAC SummitJune 30, 2014

Michael Levine-Clark, University of DenverJohn McDonald, University of Southern California

Jason Price, SCELC Consortium

John McDonaldAssociate Dean for CollectionsUniversity of Southern CaliforniaWorld-Champion Bocce Ball Player

Jason PriceProgram ManagerStatewide California Electronic Library Consortium (SCELC)Blue ribbon winner, Single Crust Pies, Los Angeles County Fair

Michael Levine-ClarkAssociate Dean for Scholarly Communication and Collections Services University of DenverCan Clean and Jerk 400 Pounds

Does implementation of a discovery service impact usage of publisher-

hosted journal content?

Dataset• 33 Libraries– 28 US, 2 CA, 1 each from UK, AUS, NZ

– WorldCat book holdings> Average: 1,114,193 ; Range: ~300k to ~2.6mil

– 4 discovery groups, of 6 libraries each

– 1 control group, 9 libraries

• Implementation dates (Discovery Libraries): > 2010 (3), 2011 (19), 2012 (2)

• 6 Publishers• 9,206 Journals• 163,545 Usable Observations

How does usage change differ across libraries using the same service?

Libraries 10-15 Libraries 16-21 Libraries 22-27 Libraries 28-33Libraries 1-9

How does usage change differ across discovery services?

ABB

C

D

Letters indicate statistically significant differences (Tukey multiple comparisons, p < .05)

How does usage change differ across publishers?

Publisher (sorted by Mean Change)

C

Letters indicate statistically significant differences (Tukey multiple comparisons, p < .01)

D

BBB

A

ResultsCan we detect differences between Discovery Services, Publishers, and/or Libraries and/or their interactions? • Library – Yes• Publisher – Yes• Discovery Service – Yes

• Differential discovery service effect by publisher – Yes

Next Steps• Design & test for effects of:

– Aggregator full text availability– Publisher Size– Journal Subject– Overall usage trends– Configuration options in Discovery services

• Expand pool of libraries• Perhaps explore WHY