![Page 1: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/1.jpg)
Are Ebooks Used Equally Across the Disciplines?
Teddy Gray, Duke University
Alex Carroll, University of Maryland
TRLN Annual Meeting
July 22, 2013
![Page 2: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/2.jpg)
Increasing Importance of Ebooks
Duke has acquired over 13,000 titles on the ebrary platform since 2008
Titles are spread across all LC classes Titles have been acquired through:
Approval plan Firm orders Demand Driven Acquisitions (DDA)
![Page 3: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/3.jpg)
Assumptions to Test
Ebooks have greater use by science patrons than humanities patrons
Science patrons are more interested in downloading chapters
Humanities patrons are more interested in downloading full titles
![Page 4: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/4.jpg)
Data Used
Number of user sessions per title Number of chapter downloads per title Number of full title downloads per title Cost per title All were mapped against LC class Tried to capture usage along with intensity of
usage
![Page 5: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/5.jpg)
Title Breakdown
![Page 6: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/6.jpg)
Titles Purchased by Year
2008 2009 2010 2011 20120
1000
2000
3000
4000
5000
6000
7000
![Page 7: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/7.jpg)
Titles by LC Class
H P B Q D J T E G L M R F N0
500
1000
1500
2000
2500
3000
![Page 8: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/8.jpg)
Usage Results
![Page 9: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/9.jpg)
Titles with Use
R F N B Q M G E H D P T J L0%
10%
20%
30%
40%
50%
60%
70%
80%
![Page 10: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/10.jpg)
Sessions per Title
Q R E F B H G N J D M L T P0
1
2
3
4
5
6
![Page 11: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/11.jpg)
Page Views per Session
L R E H Q F T D G M B J N P0
5
10
15
20
25
![Page 12: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/12.jpg)
Sessions per Chapter Download
Q T R J B D F H E G P N M L0
2
4
6
8
10
12
14
16
18
![Page 13: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/13.jpg)
Sessions per Full Title Download
P B T Q N D G J M H R E L0
10
20
30
40
50
60
70
80
![Page 14: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/14.jpg)
Usage and Cost Results
![Page 15: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/15.jpg)
Cost per Title
F E M N P D G H J L B R Q T$0
$20
$40
$60
$80
$100
$120
$140
![Page 16: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/16.jpg)
Cost per Session
R F E Q N B G H M D J P L T$0
$10
$20
$30
$40
$50
$60
$70
![Page 17: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/17.jpg)
Cost per Download
R Q F B E H J D G T N P M L$0
$100
$200
$300
$400
$500
$600
$700
![Page 18: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/18.jpg)
Results
Biggest divide between humanities and sciences: Sessions per title Sessions per chapter downloads Cost per download
![Page 19: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/19.jpg)
Results
R and Q titles: consistent high usage E and F titles: good usage and low costs T titles: low usage but high downloads P titles: low usage but highest full title
downloads Perhaps platform influenced the results
![Page 20: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/20.jpg)
Sessions per Downloadby Platform
ebrary EBL0
1
2
3
4
![Page 21: Are Ebooks Used Equally Across the Disciplines? Teddy Gray, Duke University Alex Carroll, University of Maryland TRLN Annual Meeting July 22, 2013](https://reader038.vdocuments.site/reader038/viewer/2022110323/56649d8e5503460f94a77730/html5/thumbnails/21.jpg)
Thank You