Search results

This review reports on the current state and the potential of tools and systems designed to aid online searching, referred to here as online searching aids. Intermediary mechanisms are examined in terms of the two stage model, i.e. end‐user, intermediary, ‘raw database’, and different forms of user — system interaction are discussed. The evolution of the terminology of online searching aids is presented with special emphasis on the expert/non‐expert division. Terms defined include gateways, front‐end systems, intermediary systems and post‐processing. The alternative configurations that such systems can have and the approaches to the design of the user interface are discussed. The review then analyses the functions of online searching aids, i.e. logon procedures, access to hosts, help features, search formulation, query reformulation, database selection, uploading, downloading and post‐processing. Costs are then briefly examined. The review concludes by looking at future trends following recent developments in computer science and elsewhere. Distributed expert based information systems (debis), the standard generalised mark‐up language (SGML), the client‐server model, object‐orientation and parallel processing are expected to influence, if they have not done so already, the design and implementation of future online searching aids.

This paper seeks to describe a qualitative user study of Searchling – an experimental visual interface that allows users to leverage a bilingual thesaurus for query formulation and enhancement.

The design of Searchling is based on theories of thesaurus‐based interface design, combined with the principles of rich‐prospect browsing. The Searchling interface provides the user with three working spaces on one screen: the Thesaurus space, Query space, and Document space. A total of 15 graduate and faculty researchers at the University of Alberta, were interviewed, who carried out three structured tasks in a thinkaloud protocol, with simultaneous audio recording and screen capture.

The participants identified a number of significant advantages to the researchers provided by Searchling, including the value of having an interface that could help with identifying search terms, suggesting preferred terms, and giving bilingual search support. They also suggested areas for future improvement, primarily related to the assumption that common knowledge of thesauri would be sufficient to make the various features clear, if they were described using standard vocabulary from the thesaurus field.

The interface can be implemented as an operational user interface to support users' exploratory and browsing behaviours.

The paper describes a new visual way of incorporating a thesaurus into a user interface with the ability of browsing, querying and examining the results all at the same time.

Databases on CDROM are one of the more complex types of facility that will be accessed by the general public, either in their home, in airport lounges and other public arenas or in libraries. These databases extend over a wide range of different media types including bibliographic, full‐text and multimedia. Interfaces include DOS‐based and GUI‐based products. This paper reviews the literature on the design and evaluation of user interfaces on CDROM, with the objective of distilling guidelines for these activities. More specifically the article defines interfaces, dialogues and interaction, and explores the diversity in and issues associated with standardisation in interface design for CDROMs. Current criteria and guidelines for the evaluation of CDROM interfaces include those of the Special Interest Group on CDROM Applications and Technology (SIGCAT) and guidelines proposed by other authors. Using this earlier work as a basis an alternative set of guidelines is proposed.

This paper seeks to report an investigation into the ways in which end‐users perceive a thesaurus‐enhanced search interface, in particular thesaurus and search interface usability.

Thirty academic users, split between staff and postgraduate students, carrying out real search requests were observed during this study. Users were asked to comment on a range of thesaurus and interface characteristics including: ease of use, ease of learning, ease of browsing and navigation, problems and difficulties encountered while interacting with the system, and the effect of browsing on search term selection.

The results suggest that interface usability is a factor affecting thesaurus browsing/navigation and other information‐searching behaviours. Academic staff viewed the function of a thesaurus as being useful for narrowing down a search and providing alternative search terms, while postgraduates stressed the role of the thesaurus for broadening searches and providing new terms.

The paper provides an insight into the ways in which end‐users make use of and interact with a thesaurus‐enhanced search interface. This area is new since previous research has particularly focused on how professional searchers and librarians make use of thesauri and thesaurus‐enhanced search interfaces. The research reported here suggests that end‐users with varying levels of domain knowledge are able to use thesauri that are integrated into search interfaces. It also provides design implications for search interface developers as well as information professionals who are involved in teaching online searching.

This paper aims to introduce a prototype system called SAFQuery (Simple And Flexible Query interface). In many existing Web search interfaces, simple and advanced query processes are treated separately that cannot be issued interchangeably. In addition, after several rounds of queries for specific information need(s), it is possible that users might wish to re-examine the retrieval results corresponding to some previous queries or to slightly modify some of the specific queries issued before. However, it is often hard to remember what queries have been issued. These factors make the current Web search process not very simple or flexible.

In SAFQuery, the simple and advanced query strategies are integrated into a single interface, which can easily formulate query specifications when needed in the same interface. Moreover, query history information is provided that displays the past query specifications, which can help with the memory load.

The authors' experiments by user evaluation show that most users had a positive experience when using SAFQuery. Specifically, it is easy to use and can simplify the Web search task.

The proposed prototype system provides simple and flexible Web search strategies. Particularly, it allows users to easily issue simple and advanced queries based on one single query interface, interchangeably. In addition, users can easily input previously issued queries without spending time to recall what the queries are and/or to re-type previous queries.

Clustering web search results into dynamic clusters and hierarchies provides a promising way to alleviate the overabundance of information typically found in ranked list search engines. This study seeks to investigate the usefulness of clustering textual results in web search by analysing the search performance and users' satisfaction levels with and without the aid of clusters and hierarchies.

This study utilises two evaluation metrics. One is a usability test of clustering interfaces measured by users' search performances; the other is a comprehension test measured by users' satisfaction levels. Various methods were used to support the two tests, including experiments, observations, questionnaires, interviews, and search log analysis.

The results showed that there was no significant difference between the ranked list and clustering interfaces, although participants searched slightly faster, retrieved a larger number of relevant pages, and were more satisfied when using the ranked list interface without clustering. Even so, the clustering interface offers opportunities for diversified searching. Moreover, the repetitive ratio of relevant results found by each participant was low. Other advantages of the clustering interface are that it highlights important concepts and offers richer contexts for exploring, learning and discovering related concepts; however, it may induce a certain amount of anxiety about missing or losing important information.

The evaluation of a clustering interface is rather difficult, particularly in the context of the web search environment, which is used by a large heterogeneous user population for a wide variety of tasks. The study employed multiple data collection methods and in particular designed a combination of usability and comprehension tests to offer preliminary results on users' evaluation of real‐world clustering search interfaces. The results may extend the understanding of search characteristics with a cluster‐based web search engine, and could be used as a vehicle for further discussion of user evaluation research into this area.

Development of an effective search system and interface largely depends on usability studies. The aim of this paper is to present the results of an empirical evaluation of a prototype web site search and browsing tool based on multidimensional taxonomies derived from the use of faceted classification.

A prototype Faceted Classification System (FCS), which classifies and organizes web documents under different facets (orthogonal sets of categories), was implemented on the domain of an academic institute. Facet are created from content oriented metadata, and then assembled into multiple taxonomies that describe alternative classifications of the web site content, such as by subject and location. The search and browsing interfaces use these taxonomies to enable users to access information in multiple ways. The paper compares the FCS interfaces to the existing single‐classification system to evaluate the usability of the facets in typical navigation and searching tasks.

The findings suggest that performance and usability are significantly better with the FCS in the areas of efficient access, search success, flexibility, understanding of content, relevant search result, and satisfaction. These results are especially promising since unfamiliarity often leads users to reject new search interfaces.

The results of the study in this paper can significantly contribute to interface research in the IR community, emphasizing the advantages of multidimensional taxonomies in online information collections.

Shortcomings in the BRS MENTOR mainframe interface and the desirability of using the workstation capabilities of the PC were factors in the decision to develop and implement a microcomputer‐based interface to the BRS software and associated databases. The Interface Design Subcommittee's charge was to design and implement the interface components for the Library Information Workstation, a microcomputer public terminal that provides access to local and remote online catalogs, periodical index databases, campus information resources, and information files stored on the microcomputer. This article focuses on the design of the interface to the BRS/SEARCH software and ancillary periodical index databases—initially Current Contents, six Wilson databases, and ERIC.

The purpose of this article is to review the research on human‐computer interfaces for library‐based commercial online information retrieval (IR) systems.

The review first focuses on basic interface issues for information retrieval such as interface style, end‐user searching, query formulation, relevance feedback and browsing. The second part deals with cognitive engineering in IR including mental models and individual differences. Finally, the topics on user interface engineering are covered. These include user interface guidelines, usability evaluation methods and interface engineering techniques.

The review shows that user interface design has received a limited attention from IR researchers. There is a need for adopting human‐computer interaction (HCI) techniques into IR interface designs, but this issue has not yet been fully recognised by the commercial database vendors and distributors. The paper recommends that applying HCI techniques could help in developing more usable IR interfaces.

The review identifies the main activities of a user‐centred design methodology and suggests that IR interface designers should use this method in future. This could have major implications in IR interface design for end‐user searching.

The review is the first to offer an overview of empirical research on IR interface design and IR usability engineering. Both IR researchers and practitioners may benefit from the description of previous research and the user‐centred design advocated by the current research.

There is a huge amount of information and data stored in publicly available online databases that consist of large text files accessed by Boolean search techniques. It is widely held that less use is made of these databases than could or should be the case, and that one reason for this is that potential users find it difficult to identify which databases to search, to use the various command languages of the hosts and to construct the Boolean search statements required. This reasoning has stimulated a considerable amount of exploration and development work on the construction of search interfaces, to aid the inexperienced user to gain effective access to these databases. The aim of our paper is to review aspects of the design of such interfaces: to indicate the requirements that must be met if maximum aid is to be offered to the inexperienced searcher; to spell out the knowledge that must be incorporated in an interface if such aid is to be given; to describe some of the solutions that have been implemented in experimental and operational interfaces; and to discuss some of the problems encountered. The paper closes with an extensive bibliography of references relevant to online search aids, going well beyond the items explicitly mentioned in the text. An index to software appears after the bibliography at the end of the paper.