Search (80 results, page 1 of 4)

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Abstract

Critiques the disparate literature on graphical representation, focusing on 4 representative studies. Proposes a new agenda for graphical representation research, which builds on the nascent theoretical approach within cognitive science that analyzes the role played by external representations in relation to internal mental ones. Outlines some of the central properties of this relationship that are necessary for the processing of graphical representations. Considers how this analysis can inform the selection and design of both traditional and advanced forms of graphical technology

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Abstract

This article is about the mental coding processes involved in the flow of 'information' when the user is interacting with an 'enabling' information retrieval system. An 'enabling' IR system is designed to stimulate the user's grasping towards a higher understanding of the information need / problem / task that brought the user to the IR system. C. Shannon's (1949/1959) model of the flow of information and K.R. Popper's (1975) 3 worlds concept are used to diagram the flow of information between the user and system when the user receives a stimulating massage, with particluar emphasis on the decoding and encoding operations involved as the user processes the message. The key difference between the model of information flow proposed here and the linear transmission, receiver-oriented model now in use is that we assume that users of a truly interactive, 'enabling' IR system are primarily message senders, not passive receivers of the message, because they must create a new message back to the system, absed on a reconceptualization of their information need, while they are 'online' interacting with the system

Date

22. 5.1999 14:51:49

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Abstract

This article is a contribution to the development of a comprehensive interdisciplinary theory of LIS in the hope of giving a more precise evaluation of its current problems. The article describes an interdisciplinary framework for LIS, especially information retrieval (IR), in a way that goes beyond the cognitivist 'information processing paradigm'. The main problem of this paradigm is that its concept of information and laguage does not deal in a systematic way with how social and cultural dynamics set the contexts that determine the meaning of those signs and words that are the basic tools for the organisation and retrieving of documents in LIS. The paradigm does not distinguish clearly enough between how the computer manipulates signs and how librarians work with meaning in practice when they design and run document mediating systems. The 'cognitive viewpoint' of Ingwersen and Belkin makes clear that information is not objective, but rather only potential, until it is interpreted by an individual mind with its own internal mental world view and purposes. It facilitates futher study of the social pragmatic conditions for the interpretation of concepts. This approach is not yet fully developed. The domain analytic paradigm of Hjoerland and Albrechtsen is a conceptual realisiation of an important aspect of this area. In the present paper we make a further development of a non-reductionistic and interdisciplinary view of information and human social communication by texts in the light of second-order cybernetics, where information is seen as 'a difference which makes a difference' for a living autopoietic (self-organised, self-creating) system. Other key ideas are from the semiotics of Peirce and also Warner. This is the understanding of signs as a triadic relation between an object, a representation and an interpretant. Information is the interpretation of signs by living, feeling, self-organising biological, psychological and social systems. Signification is created and controlled in an cybernetic way within social systems and is communicated through what Luhman calls generalised media, such as science and art. The modern socio-linguistic concept 'discourse communities' and Wittgenstein's 'language gane' concept give a further pragmatic description of the self-organising system's dynamic that determines the meaning of words in a social context. As Blair and Liebenau and Backhouse point out in their work it is these semantic fields of significance that are the true pragmatic tools of knowledge organisation and document retrieval. Methodologically they are the first systems to be analysed when designing document mediating systems as they set the context for the meaning of concepts. Several practical and analytical methods from linguistics and the sociology of knowledge can be used in combination with standard methodology to reveal the significant language games behind document mediation

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Abstract

The paper consists of a series of charts and diagrams rather than a text. Considers the way in which users of printed information sources develop a mental map to assist them in navigation and transfers the psychological concepts underlying the development of such mental maps to the design of hypertext searching systems for computerized information retrieval

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Abstract

2 studies examined the effect that mental representations derived from maps and verbal descriptions have on the recall of facts from a text. In experiment 1, subjects studies a map of Tasmania, a control map of Ceylon, or comparable verbal descriptions and then listened to a text containing facts about Tasmania. Fact recall was higher and map drawings were more accurate for the group that studied the Tasmania map. In experiment 2, subject studied a map of Tasmania, or one of two verbal descriptions (using different sequences of landmarks) of Tasmania. The results replicated those of experiment 1. These findings suggest that there may be fundamental differences between visual and verbal representations of the same space

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Abstract

Studies of public understanding, which include specific areas of study, such as: public understanding of science; intuitive physics; nutritional myths; and the 'mental mappimg' of geographical space are seen as falling into a general model of information transfer, using Popper's notion of 3 worlds. The deficiencies and distortions of understanding revealed by these studies can be perceived as defects in information transfer from worlds 1 and 3 (physical world and subjective world of mental phenomena respectively) to world2 (intellectual content of cultural artifacts). Proposes that more detailed cognitive profiling could identify these problem areas, thus enabling remedial measures to be taken to ensure better information transfer to the public in specific areas, such as: promotion of health care; education and advertising

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Abstract

What exactly are the Wellsian World Brain or World Encyclopedia ideas to which reference is so often made? What did they mean for Wells? What might they mean for us? This article examines closely what Wells says about them in his book, World Brain (1938), and in a number of works that elaborate what is expressed there. The article discusses aspects of the context within which Wells's conception of a new world encyclopedia organization was formulated and its role in the main trust of his thought. The article argues that Wells's ideas about a World Brain are embedded in a strucutre of thought that may be shown to entail on the one hand notions of social repression and control that must give us pause, and on the other a concept of the nature and organization of knowledge that may well be no longer acceptable. By examining Wells's ideas in some detail and attempting to articulate the systems of belief which shaped tham and which otherwise lie silent beneath them, the author hopes to provoke questions about current theorizing about the nature of global information systems and emergent intelligence

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Abstract

In order to test how associated verbal and spatial stimuli are processed in memory, undergraduates studied a reference map as either an intact unit or as a series of individual features, and read a text containing facts related to map features. In Addition, the map was presented either before or after reading the text. Seeing the intact map prior to the text led to better recall of both map information and facts from the text. These results support a dual coding modell, where stimuli such as maps possess a retrieval advantage because they allow simultaneous representation in working memory. This advantage occurs because information from the map can be used to cue retrieval of associated verbal facts, without exceeding the processing constraints of the memorial system

Date

22. 7.2000 19:18:18

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Source

International forum on information and documentation. 20(1995) no.1, S.22-30

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Abstract

It is discussed what is underlying the assumption of modality-specific processing systems and representations. Starting from the information processing approach relevant aspects of mental representations and their physiological realizations are discussed. Then 3 different forms of modality-specific systems are distinguished: as stimulus specific processing, as specific informational formats, and as modular part systems. Parallel to that 3 kinds of analogue systems are differentiated: as holding an analogue-relation, as having a specific informational format and as a set of specific processing constraints. These different aspects of the assumption of modality-specific systems are demonstrated in the example of visual and spatial information processing. It is concluded that postulating information-specific systems is not a superfluous assumption, but it is necessary, and even more likely it is inevitable consequence of an optimization of stimulus processing

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Abstract

Discusses the various purposes of knowledge representation including the understanding of texts, cognitive research, expert system development and information retrieval. Analyses the relationship of classification to knowledge, including the role of cluster analysis. Examines the problems of knowledge representation and the solution offered through proper classification

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Abstract

The inferential communication model, which implies that the meaning of a document is inferred in the context of the user's situation to result in different meanings for users in different situations, is used to study an inferential science document representation method. Several topical components and non topical components of the science document were found as the inferred meanings of the document. These show the science document aspects which are used for relevance judgements. Science documents need to be represented in terms of these aspects for effective system's, intermediary's, and user's judgements of the meaning and the relevance of the document

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Abstract

Hypermedia information systems, because of their inherent qualities of nonlinearity and associative linking, offer the potential of facilitating enhanced knowledge representation and construction for users. These capabilities will be more fully realized if hypermedia information systems are developed and implemented based on constructivist learning theory. Examines the qualities of hypermedia systems that enable them to facilitate learning, discusses the background of current learning theories and provides a brief view of a possible hypermedia system based on constructivist learning principles that could be developed through the use of intellegent autonomous agents

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Abstract

The new forms of multimedia information and reference materials require an analysis of the concept of knowledge representation and how knowledge can be extracted from them. Compares these concepts with a model of human information processing and knowledge representation which is based on communication oriented concepts. Proposes a typology of general reference materials based upon this comparison. Original abstract

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Abstract

Modelling of semantic space is discussed with specific reference to the authors' NSF-funded project on knowledge representation in dictionaries, thesauri, and free text. Research findings are discussed in relation to future research needs

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Abstract

Recently, a new book on knowledge organization has been published by Greenwood Press. The title is 'Information seeking and subject representation: an activity-theoretical approach to information science'. This book presents a new general theory for information science and knowledge organization, based on a theory of information seeking. The author is Dr. Birger Hjørland, Royal School of Library and Information Science. In 1994, he presented his work on theory for KO at the 3rd International ISKO conference in Copenhagen. The book aims to provide both a new understanding for the foundations of information science and knowledge organization, and to provide new directions in research and teaching within these fields. KO (Hanne Albrechtsen) has interviewed Birger HjÝrland in Copenhagen about his views on knowledge organization and subject representation

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Footnote

Übers. des Titels: Knowledge analysis and representation: contributions from cognitive psychology

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Abstract

Cognitive research into information science started at the International Workshop on the Cognitive viewpoint, Ghent, Belgium, 1977, where it was made clear that the task of research is to improve information flow, specifically through creating models of users' knowledge compatible with the conceptual frameworks used by information retrieval systems. Divides users' knowledge into knowledge of the world, of the information retrieval system, of the task and of the domain. Cognitivism as a research direction in information science explains how the cognitive processes and objects might influence information retrieval and representation

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Date

31.12.1996 19:29:41
22. 7.2000 19:04:41