Applying visualizationtechniques to developinterfaces for educationalrepositories: the case ofOrganic.Lingua and VOA3RDavid Martin-Moncunill, Salvador Sánchez, Alonso Paulo A. Gaona García, Nikolaos Marianos
Motivation Most educational digital repositories include aknowledge classification scheme. The idea of using a visual interface to show andnavigate through these schemas, sounds promising. Several digital repositories have implemented or areconsidering to implement one. This would require a big implementation effort evaluate before starting to work.
Case Studies: Organic.Edunet & OrganicLingua Experiments OE: In-depth usability study involving different user profiles (2011). Heuristic Analysis, thinking aloud protocol, interviews, benchmarks, focus groups,questionnaires. OL: Pilot & Usability trials, Starting January 2013. Spanish Society for EcologicalAgriculture. Not included in the paper: France (March 2013- domain experts), Spain (April 2013 – ITprofile), UK (April 2013 – General Public)
Case Studies: VOA3R Facilitate the open sharing of scientific and scholarly research publicationsand outcomes related to agriculture, aquaculture, food and environment. Agrovoc thesaurus used for knowledge representation. “Drag & Drop” interface to navigate and search.
Case Studies: VOA3R Experiments Information gathered from VOA3R pilot & validation trials (>20). Usability techniques such as thinking aloud, interviews or cognitivewalkthroughs. These results are described and published as part of the projectdeliverables.
Case Studies: Usability study of taxonomy-visualization user interfaces in digital repositories In-depth study for the analysis of the perception and interaction levels. Obtain conclusions that would ultimately lead to development decisions and theadaptation of user interfaces. (To be published) The experiment analised the thematic-coverage of the Europeana digital library,according to a mature and well known taxonomic structure the AAT thesaurus.
Results Several usability problems were found for each visual interface.
Results (II) Three key problems beyond the visualinterfaces’ usability:Utility -What are the benefits ofusing these kind of interfaces?Learnability - Will I have to learnhow to use the interfaces & basicsof KOS?KOS Usability – I don’t understandthe classification scheme!UtilityKOSUsabilityLearnability
Conclusions Visualization techniques could be a very helpful tool for learning /educational repositories using KOS. To reach this goal an important effort on the usability side must bedone . There are 3 key problems that prevent users from widely adoptingthem. Making efforts trying to solve other usability problems in animplemented interface will most probably be useless if these keyproblems are not solved first.
THANKS!David Martin-Moncunill (firstname.lastname@example.org )Salvador Sánchez Alonso (email@example.com )Computer Science Department, University of Alcalá, Spain.Paulo A. Gaona García (firstname.lastname@example.org )Faculty of Engineering, Distrital University, Colombia.Nikolaos Marianos (email@example.com )Department of Shipping Trade and Transport, University of the Aegean,Greece