Evaluation of Digital Library PPT
- 2. Criteria in DL evaluation •in DL: no basic or standardized criteria, no overall agreement 2
- 3. In digital libraries: •performance (effectiveness, efficiency) on basis of given criteria •performance could be related to usability. •The performance of the system depends strongly on the formats, structures and representations of the content. 3
- 4. • Usefulness ---which concerns the “User” and “Content” components. The usefulness of the content and its relevance to the user tasks and needs are the reasons behind the selection and usage of a DL. This relevance is translated into actual relevance, type and level of resource relevance and task relevance.
- 5. 5 USABILITY •International Standards Organization - ISO 9241-11 (1998) •“Extent to which a user can achieve goals with effectiveness, efficiency and satisfaction in context of use”
- 6. 6 • Jacob Nielsen (usability guru) • definition: “Usability is a quality attribute that assesses how easy user interfaces are to use. The word "usability" also refers to methods for improving ease-of-use during the design process.”
- 7. Six Classes of Criteria for DL Evaluation Derived From Literature •content – how well are digital collections selected, developed; objects created, organized, represented, presented
- 8. • technology • how well do hardware & software support library functions • Interface – what is available for users to interact & how much is interaction supported or hindered 8
- 9. • Process/Service – what processes & assistance are provided; what range of services is available; how well are they functioning; (carrying out tasks as: search, browse, navigate, find, evaluate or obtain a resource)
- 10. • user – what are the outcomes of DL use – changes in human information behavior, cognitive state, decision- making, problem-solving; impact on accomplishing tasks; broader impact/benefit in research, professional work
- 11. •context – how well does a DL fit into, respond to, follow larger context – institutional, economic, legal, social, cultural; effects on context 11