2. © Tefko Saracevic, Rutgers University1 digital libraries and human information behavior Tefko Saracevic, Ph.D. School of Communication, Information and Library Studies Rutgers University http://www.scils.rutgers.edu/~tefko

3. © Tefko Saracevic, Rutgers University2 digital libraries global phenomenon –many institutions & fields involved –many research efforts & programs –many practical developments in and beyond libraries –large expenditures in research & practice –applications & use growing exponentially –huge effects, some unpredictable –but study of human aspects relatively neglected

4. © Tefko Saracevic, Rutgers University3 what are digital libraries? a number of conceptions with varying emphasis on: –technical aspects –content –organization –access –use –institutions research & practice differ in emphasis technological imperative predominates

5. © Tefko Saracevic, Rutgers University4 Institution, Context Task, Context A digital library service model adapted from Donald Waters, Digital Library Federation

6. © Tefko Saracevic, Rutgers University5 where do humans fit? in all of these processes –but when looking at information behavior in the context of digital libraries, we tend to restrict it to user and use end – left side of the model –as yet, we are not sure what processes & variables to observe what context & effects to include what models, measures, methodologies to use

7. © Tefko Saracevic, Rutgers University6 dl research most done on right side of the model –technical aspects, content handling, organization, operations, access tools … in comparison human information behavior was investigated much less –still there are a number of studies in a variety of countries

8. © Tefko Saracevic, Rutgers University7 context of studies some studies indeed concentrated on human information behavior in d-libraries but, most were a part of d-lib evaluation –users used various features/processes –i.e. evaluation was goal and findings on human information behavior were a byproduct d-library evaluation & studies of human information behavior are mixed together

9. © Tefko Saracevic, Rutgers University8 methods used surveys interviews observations think aloud focus groups ethnographic analysis log analysis record analysis experiments given task accomplishments economic preferences you named it!

10. © Tefko Saracevic, Rutgers University9 classes of variables studied users – who uses a d-library? features – what features are used? access – how is it used? use – what content is used? for what? usability – ease? effectiveness? outcomes – with what results?

11. © Tefko Saracevic, Rutgers University10 users population, reasons –who uses a given d-library and why? tasks, queries –what is their nature? knowledge, understanding –what knowledge & learning needed? preferences, expectations –what is preferred? expected?

12. © Tefko Saracevic, Rutgers University11 features – what available features in a d-library are being used? frequency & amount – how much are they used? distribution? patterns –what may be patterns in use of any feature? individual differences –how do individuals differ in use of features?

13. © Tefko Saracevic, Rutgers University12 access –how? from where? how often? repeated? discovery –how searched, navigated, browsed, retrieved? time, effort –what does it take to use & find?

14. © Tefko Saracevic, Rutgers University13 use distribution –how many items in collection used? application –for what were the items actually used? social –what are social practices associated with digital library use?

15. © Tefko Saracevic, Rutgers University14 usability ease of use –how easy are interfaces & features to use? effectiveness –how effectively are they used? barriers –what hindrances? frustrations? learning effort –how much needs to be learned? how?

16. © Tefko Saracevic, Rutgers University15 outcomes downloads –what & how much is downloaded? assessments –what value? relevance? usefulness? satisfaction? effects –what impact on activities? e.g. education, scholarly communication

17. © Tefko Saracevic, Rutgers University16 some interesting results users –half are repeated users features –many not used access –varies by nature of desired materials –users vary in skills & understanding

18. © Tefko Saracevic, Rutgers University17 results … use –80 – 20 rule seems valid – a small proportion of collection is used –downloads are significant usability –many barriers to use –effectiveness varies greatly –frustration is easily triggered

19. © Tefko Saracevic, Rutgers University18 results … outcomes –many queries do not lead to viewing –text materials not appealing –valuing varies with age

20. © Tefko Saracevic, Rutgers University19 studying inf behavior in d-library context impossible? not really hard? very mostly subsumed under d-library evaluation could not generalize yet no theories no general models emerged yet, although some proposed –here is one

21. © Tefko Saracevic, Rutgers University20 d - library model for studying human inf behavior in digital libraries users, tasks, contexts outcomes features access use usability seeking inf

22. © Tefko Saracevic, Rutgers University21 technological imperative human information behavior in d- libraries quite different then in traditional libraries behavior related more to technology side then library side

23. © Tefko Saracevic, Rutgers University22 conclusions research on human information behavior in d-libraries still in infancy not funded much, if at all but necessary for understanding how to build better d-libraries and services

24. © Tefko Saracevic, Rutgers University23 inf behavior digital library How to do it?

25. © Tefko Saracevic, Rutgers University24 sources URLs for the mentioned & many other sites dealing with studies on d-library – evaluation – human information behavior – usability can be found on: http://scils.rutgers.edu/~miceval

26. © Tefko Saracevic, Rutgers University25

27. © Tefko Saracevic, Rutgers University26