Published on March 2, 2014
Sanjeet Mann Arts and Electronic Resources Librarian, University of Redlands SCELC Research Day, March 4, 2014 http://www.slideshare.net/sanjeetmann
Defined as a research method replicating the steps that library users take from a citation to full text (or an error)
Proxy Innovative WAM Source RILM (Proquest) KB Proquest 360 Core Resolver Proquest 360 Link Target Oxford Journals ILLIAD OCLC ILLIAD
Can users get to the full text? How often do they get errors? What kind of errors? Should you be satisfied with your knowledge base (KB) vendor? Do you have enough full text in your collection? How often do your users need ILL? Are you teaching users what they need to know to successfully access e-resources?
4 searches x 10 disciplines x 10 results = 400 item sample (estimates overall population with 98% confidence, +/- 5% error)
2012: http://goo.gl/606us 2013: http://goo.gl/O5XK9A
45% 40% 41% 41% 38% 35% 30% 25% Local Avail 20% 13% 15% 10% 5% 0% 2012 2013 Error
Value % before % after Z score Result Error rate 37.5 13.5 7.79 SIGNIFICANT! Local availability 40.8 40.5 0.09 Not significant
2012 1- Proxy errors 2013 Z score Result 1.3% 0% 2.25 Significant Proxy Source KB Resolver Target ILLIAD
2012 2 – Source errors 2013 Z score Result 8.5% 8.3% 0.09 Not significant Proxy Source KB Resolver Target ILLIAD
2012 3 – kb errors 2013 Z score Result 6.3% 4.0% 1.44 Not significant Proxy Source KB Resolver Target ILLIAD
2012 4 – Resolver errors 2013 Z score Result 1.8% 0.0% 2.70 Significant Proxy Source KB Resolver Target ILLIAD
2012 5 – Target errors 2013 Z score Result 3.8% 1.3% 2.27 Significant Proxy Source KB Resolver Target ILLIAD
2012 6 – ILLIAD errors 2013 Z score Result 16.0% 0.0% 8.34 SIGNIFICANT! Proxy Source KB Resolver Target ILLIAD
dissertations, 9% proceedings, 2% chapters 8% books 6% articles 75%
90% 80% 70% 60% 50% 2012 40% 2013 30% 20% 10% 0% MUS ENG PHIL PSYC HIST ECON SOC BIO CDIS MATH
100% 90% % of total sample 80% 70% ILL 59% ILL 60% Print 5% Print 4% Online 36% Online 37% 2012 2013 60% 50% 40% 30% 20% 10% 0%
Availability studies can help you make a statistically significant reduction in errors Supports evidence based librarianship Advocate w/ vendors to improve metadata chain More full text resources? More ILL requests? Should first years avoid A&I databases? Do discovery services help or hurt?
Conduct availability studies at other libraries Availability study with Redlands students What are your e-resource experiences? Further Reading Kanji, Gopal K. 2006. 100 Statistical Tests. 3rd ed. Thousand Oaks: Sage Publications. Mann, Sanjeet. 2013. “Measuring Electronic Resource Availability” presented at the SCELC Research Day, March 5, Loyola Marymount University. http://www.slideshare.net/sanjeetmann. Nisonger, Thomas E. 2007. “A Review and Analysis of Library Availability Studies.” Library Resources & Technical Services 51 (1): 30–49. Trainor, Cindi, and Jason Price. 2010. Rethinking Library Linking: Breathing New Life into OpenURL. Vol. 46. Library Technology Reports 7. Chicago: American Library Association.
Proxy error (domain not in forward table)
Source error (both rft.jtitle and rft.title)
KB error (“Get Article” link is missing because SerSol collection doesn’t support article level linking)
Resolver error (match on wrong journal title)
Target error (Page unavailable)
ILLIAD error (book chapter treated as an article; rft.atitle used for two fields)
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