oclc online computer library center what can be learned from usage data lynn silipigni connaway...
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OCLC Online Computer Library Center
What Can Be Learned From
Usage DataLynn Silipigni ConnawayResearch Scientist
Mark BendigSystems Analyst
ASIST 2003 Annual ConferenceOctober 22, 2003
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What Can Be LearnedWhat Can Be LearnedWhat is being accessed– Subject areas– Types of content– Publishers of content
Depth of access– Perusing– In-depth reading– Number of items accessed– Number of screens/pages accessed
Patterns of access– When accessed– Length of use/activity– Movements within the site and the text
• System and interface design
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Limitations of Usage DataLimitations of Usage Data
Do not know – Who the users are
• Usually cannot associate user demographics with usage patterns
– Where they get access to the resources– How they use resources– Why they use resources
Massive amounts of data to manipulate
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netLibrary Subject AreasnetLibrary Subject Areas
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Accesses by ARL LibrariesAccesses by ARL Libraries
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Accesses by Academic LibrariesAccesses by Academic Libraries
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Accesses by Public LibrariesAccesses by Public Libraries
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Accesses by Special LibrariesAccesses by Special Libraries
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Accesses by Federal LibrariesAccesses by Federal Libraries
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Accesses by School LibrariesAccesses by School Libraries
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netLibrary Site ActivitynetLibrary Site Activity
Unique Users– Tues., 2/26/02 = 3796– Wed., 2/26/03 = 8789
Total Sessions– Tues., 2/26/02 = 3989– Wed., 2/26/03 = 9458
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netLibrary Session DurationsnetLibrary Session Durations
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netLibrary Login TimesnetLibrary Login Times
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Books Viewed Per SessionBooks Viewed Per Session
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Books Viewed Per SessionBooks Viewed Per Session
Minimum Maximum Average
2/26/02 1 31 1.27
2/26/03 1 650 1.42
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Pages Viewed Per BookPages Viewed Per Book
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Pages Viewed Per BookPages Viewed Per Book
Minimum Maximum Average
2/26/02 1 594 13.41
2/26/03 3 722 13.61
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Pages Viewed Per SessionPages Viewed Per Session
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Pages Viewed Per SessionPages Viewed Per Session
Minimum Maximum Average
2/26/02 7 594 17.15
2/26/03 1 1508 19.34
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Data InterpretationData Interpretation
Increase in number of users
Increase in duration of sessions
Little difference in– Books viewed per session– Pages viewed per session– Pages viewed per book
Peak usage times correlate with time most libraries are open and available– Need to distinguish differences in time zones
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Future ResearchFuture ResearchIdentify the whys and hows of user satisficing of information needs– Online survey– Focus group interviews– Structured field observations– Structured interviews
Continue to collect, analyze, and compare transaction log data– Users’ geographical location– Identify books per unique user– Correlate data sets