Anais do IHC'2001 - Departamento de Informática e Estatística - UFSC

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190 5. Evaluation Anais do IHC’2001 - IV Workshop sobre Fatores Humanos em Sistemas Computacionais Our implementations of personal and group spaces have undergone various preliminary usability and performance tests with encouraging results. We have focused initial tests to our main target communities: college students, professors and administrative staff. Test participants have included over 20 library personnel, ten faculty members, 20 undergraduate students and five graduate students. For our tests we have used mainly our collection of digital theses and the online catalog of our physical library, which comprises over 230,000 physical volumes. Figure 4. The interface of EGA – Learning Group Spaces. In addition to usability inspection tests, we have been observing users experiment with the prototypes. With only minimal initial guidance, users of MiBiblio have been able to personalize their information space by creating rooms, changing their appearance, and more importantly, by gathering library materials (mostly theses) and references (online catalog entries) and placing them in bookshelves. From their personal space, users also have been able to open digital documents and launch applications such as UVA and Zeus, and to generate and monitor instances of the SyReX recommender agent. MiBiblio has been in use for about nine months. However, some of the services and applications described in this paper have become available more recently. As stated earlier, MiStudio was developed in response to infrastructure limitations to support the tools used in MiBiblio, as many of our target users have Macintosh computers and the required version of the Java plug-in is not available for this platform as of this writing. Users who have tried both alternatives have preferred MiBiblio’s highly personalizable functionality, but have rated MiStudio favorably with regard to its performance. MiStudio has been available for about only one month and hence a more formal comparative evaluation has yet to be undertaken.
Anais do IHC’2001 - IV Workshop sobre Fatores Humanos em Sistemas Computacionais 191 As for EGA, we have observed how it has been used formally as a means for supporting a graduate course and also as an environment for the discussion of project ideas. Users have been able to start new group spaces easily and to join existing groups or ongoing discussions without any significant problems. Minutes (saved discussions) have been used extensively to record discussion results or just as a mechanism to suspend collaborative work to be resumed at a later time. Digital theses and book references have been carried to group spaces and users have been able to make annotations and examine their contents when suggested by other group participants. In general, users of MiBiblio, MiStudio and EGA have found the interfaces attractive and intuitive. In response to explicit surveys, over 80 percent of the users considered personal and group spaces useful and a unifying view of library resources. In all cases, close to 70 percent of the users were able to carry out the tasks they were asked or intending to do. 6. Related Work There is a significant amount of work that has nurtured, or has been developed in parallel to, our notions of personal and group spaces. In the area of personalization of information spaces, DLITE [Cousins et al. 1997] introduces the concept of personal workcenters, in which users can perform tasks and access distributed information in a transparent manner. Among the differences with our work we can mention our emphasis on the integration of physical and digital resources and the incorporation of agent representations in personal spaces. The impact of “one-stop” library portals on libraries, information providers and users, from the organizational, cultural and learning perspectives is discussed at length by Lakos and Gray [2000]. An example of library portal is Cornell University Library’s MyLibrary. This project comprises two main services: MyLinks, a tool for collecting and organizing resources for private use by a patron, and MyUpdates, a tool to help scholars stay informed of new resources provided by the library. This is an important effort in personalizing a commercial online catalog. Our emphases on digital contents, graphical interface components and agent-based interaction are distinguishing aspects of our work with respect to Cornell’s. An architectural proposal for personalized information environments that is more oriented to digital libraries is presented by French and Viles [1999]. They consider personalized collections built from centrally maintained indices or indices constructed by a client from distributed repositories. In our architecture, we also consider the participation of mobile agents that travel through a federation of digital libraries so users may transparently access distributed repositories from a uniform interface. Work aimed at supporting group activities is abundant in the CSCW/groupware literature. Our concept of group spaces particularly has built upon advances in group awareness, annotation, and synchronous learning spaces. In particular, the awareness mechanisms in our implementation of group spaces have been used before in early collaborative environments such as the Grove [Ellis et al. 1991] and Sasse [Baecker et al.1993] group editors.
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De 15 a 17 de outubro de 2001 Flori
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Sumário Apresentação............
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Análise Ergonômica do Estado da A
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de formidável coesão, denominado
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Sociedade Brasileira de Computaçã
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IV Workshop sobre Fatores Humanos e
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