Semantic networks: visualizations of knowledge

The history of semantic networks is almost as long as that of their parent discipline, artificial intelligence. They have formed the basis of many fascinating, yet controversial, discussions in conferences and in the literature, ranging from metaphysics through to complexity theory in computer science. Many excellent surveys of the field have been written, and yet it is our belief that none of them has examined the important link between their use as a formal scheme for knowledge representation and their more heuristic use as an informal tool for thinking. In our consideration of semantic networks as computerized tools, we will discuss three levels of abstraction that we believe can help us understand how semantic networks are used. I.     

Mediating between international knowledge and local knowledge: The critical role of local field officers in an HIV prevention intervention

The outcomes of health interventions are co‐constructed through negotiation between the competing knowledges of different stakeholders. In such a context, local implementing partners – who mediate between international donors/programme managers and local beneficiary communities – have a critical ‘knowledge brokering’ role to play. With appropriate support, they can facilitate integration of internationally established knowledge with local beliefs and practices in ways that support health‐enhancing behaviour change. This paper focuses on the local field officers of an HIV prevention programme with Cambodian military couples. The paper asks: (1) what are the outcomes of knowledge encounters between international organizations and local field officers, as expressed in field officers' interpretation of programme goals, strategies and messages? (2) To what extent does the intervention context support the field officers' knowledge brokering efforts? Data collected includes semi‐structured interviews, observations of programme meetings and activities, and textual materials. The findings demonstrate that field officers privilege international knowledge, particularly in interactions with international manager–partners. However, in the field, they both hybridize programme messages and struggle to resolve dilemmas provoked by conflicting international and local knowledges. Material and symbolic asymmetries within the intervention context are shown to undermine their knowledge brokering efforts, as field officers attempt to claim identities and futures as health development professionals. Implications for programme practices and accountability systems are discussed. Copyright © 2010 John Wiley & Sons, Ltd.     

Reflexive action research: Developing knowledge through practice

This paper gives an overview of different ways of conducting counselling and psychotherapy research. An approach to research is described which overcomes the research‐practice gap: reflexive action research. It is argued that this approach to research is particularly appropriate and relevant for practitioners since it draws upon skills and awareness necessary for clinical work, and can complement positivist methods of research which are already well established in the profession. The wider use of systematic clinical case studies is suggested as a means of promoting the reflexive action research approach. Further consideration of issues of validity and reliability is required on the part of those intending to apply this approach within the field of therapy research.     

Effects of prior knowledge on memory for new information

Three experiments examined the effects of prior knowledge on the learning and retention of new information. Subjects learned varying amounts of prior knowledge about individuals referred to by first name/last name combinations. In the first two experiments, subjects more rapidly learned new information about individuals for whom they were given prior knowledge, retrieved this information more slowly, and showed smaller interference (fan) effects. This complex of results is predicted by a spreading activation model in which we assume subjects try to integrate the prior knowledge with the new information in a network fashion. The third experiment, in addition to including conditions of prior vs. no prior experimental knowledge, included well-known names like Ted Kennedy, about which subjects have a great deal of preexperimental prior knowledge. The relationships between conditions of experimental prior knowledge and no prior knowledge obtained in Experiments 1 and 2 were replicated, but the well-known names did not behave simply like the extreme of experimental prior knowledge. In particular, subjects showed the fastest verification of new facts learned about the well-known names, rather than the slowest, as predicted from the spreading activation network model.     

Issues of knowledge in the policy of self-determination for aboriginal Australian communities

Since 1972, the direction of policy concerning development of Aboriginal Australian communities has been towards adoption of the notion of self-determination. This paper presents a case study of how one particular Aboriginal community has combined local knowledge with non-Aboriginal knowledge to develop an alternative mathematics curriculum that will promote community development and authentic self-determination.     

Scientific and lay communities: earning epistemic trust through knowledge sharing

Feminist philosophers of science have been prominent amongst social epistemologists who draw attention to communal aspects of knowing. As part of this work, I focus on the need to examine the relations between scientific communities and lay communities, particularly marginalized communities, for understanding the epistemic merit of scientific practices. I draw on Naomi Scheman’s argument (2001) that science earns epistemic merit by rationally grounding trust across social locations. Following this view, more turns out to be relevant to epistemic assessment than simply following the standards of “normal science”. On such an account, philosophers of science need to attend to the relations between scientific communities and various lay communities, especially marginalized communities, to understand how scientific practices can rationally ground trust and thus earn their status as “good ways of knowing”. Trust turns out to involve a wide set of expectations on behalf of lay communities. In this paper I focus on expectations of knowledge sharing, using examples of “knowledge-sharing whistleblowers” to illustrate how failures in knowledge sharing with lay communities can erode epistemic trust in scientific communities, particularly in the case of marginalized communities.     

Developmental issues in indigenous psychologies: Sustainability and local knowledge

The present paper endeavours to discuss some of the potential issues inherent in the developmental work for indigenous psychologies, especially in the Western context. The discussion is made around two topical issues, sustainability and local knowledge. The developmental processes in indigenous psychologies are influenced by the inter- and intracommunity environment. It is important to trace the development of local knowledge in a sustained community environment. The cross-fertilization of ecological perspectives with indigenous psychological knowledge can enlighten our understandings of global issues in psychology as well as the applications of psychological knowledge to a local context. A theoretical model is proposed to highlight major social psychological processes in a participatory community environment − the model is expected to address essential contentious issues to the future of a globalized psychology, especially the way integrated local knowledge can lay the foundations of a globalized indigenous psychology.     

The practice of psychology in rural communities: potential ethical dilemmas

The practice of psychology in rural areas offers unique challenges for psychologists as they try to provide optimal care, often with a minimum of resources. Psychologists are frequently required to be creative and flexible in order to provide effective services to a wide range of clients. However, these unique challenges often confront psychologists with ethical dilemmas and problems for which their urban-based training has not prepared them. The author examines how certain characteristics of rural communities may lead to specific ethical dilemmas. By being a part of a small community, psychologists will inevitably face multiple relationship dilemmas. Confidentiality is harder to maintain in a small town, particularly with its informal information-sharing network. To provide services to meet community needs, with a limited number of referral options, psychologists typically need to be generalists. This may lead to concerns about scope of practice, training, and experience with diverse populations. Psychologists also face other competency issues, such as a lack of supervision and consultation resources. Other concerns addressed include the psychologist's personal life, and the blurring of professional and personal roles. Suggestions are made for coping with each of these ethical issues, although more quantitative research and discussion are needed on the practice of psychology in rural areas.     

Observation and physical practice: different practice contexts lead to similar outcomes for the acquisition of kinematic information

Psychological Research - This study differentiated the contributions of physical and observational practice to the learning of a single-limb multi-joint coordination pattern. Three groups...     

New knowledge for old credences: Asymmetric information search about in-group and out-group members

Three experiments examined how people gather information on in-group and out-group members. Previous studies have revealed that category-based expectancies bias the hypothesis-testing process towards confirmation through the use of asymmetric-confirming questions (which are queries where the replies supporting the prior expectancies are more informative than those falsifying them). However, to date there is no empirical investigation of the use of such a question-asking strategy in an intergroup context. In the present studies, participants were asked to produce (Study 1) or to choose (Studies 2 and 3) questions in order to investigate the presence of various traits in an in-group or an out-group member. Traits were manipulated by valence and typicality. The results revealed that category-based expectancies do not always lead to asymmetric-confirming testing: whereas participants tended to ask questions that confirmed positive in-group and negative out-group stereotypical attributes, they used a more symmetric strategy when testing for the presence of negative in-group or positive out-group traits. Moreover, Study 3 also revealed a moderation effect of in-group identification. The findings point to the role played by motivational factors associated with preserving a positive social identity. Possible consequences of these hypothesis-testing processes in preserving a positive social identity for intergroup relations are discussed.     

Developing networks in disempowered communities: Experiencing hardships while focusing on opportunities

This study aims to present an evaluation and the process steps of a community‐based initiative (CBI) consisting of a group of organizations that work to enhance the lives of boys and men of colour. Using a participatory research model, the researchers collaborated with 14 community stakeholders to develop the questions during two data collection periods and reviewed the reports for accuracy. The findings were separated into two broad categories. The perceived challenges included a lack of clear goals and measurements of success, an absence of leadership and direction, and a shortage of resources. The successes included passion of partners, increased collaboration, and increasing and maintaining social capital within the community. The lessons learned from both data collection periods helped this CBI broaden its reach and collaboration efforts. Overall, this study provides suggestions to other CBIs as they embark on making changes in their own communities.     

Assessing the local identifiability of probabilistic knowledge structures

Given a collection Q of problems, in knowledge space theory Doignon & Falmagne, (International Journal of Man–Machine Studies 23:175–196, 1985) the knowledge state of a student is the collection K ? Q of all problems that this student is capable of solving. A knowledge structure is a pair (Q, ), where is a collection of knowledge states that contains at least the empty set and Q. A probabilistic knowledge structure (PKS) is a knowledge structure (Q, , π), where π is a probability distribution on the knowledge states. The PKS that has received the most attention is the basic local independence model BLIM; Falmagne & Doignon, (British Journal of Mathematical and Statistical Psychology 41:1–23, 1988a, Journal of Mathematical Psychology 32:232–258, 1988b). To the best of our knowledge, systematic investigations in the literature concerning the identifiability of the BLIM are totally missing. Based on the theoretical work of Bamber and van Santen (Journal of Mathematical Psychology 29:443–473, 1985), the present article is aimed to present a method and a corresponding computerized procedure for assessing the local identifiability of the BLIM, which is applicable to any finite knowledge structure of moderate size.     

Adult-child discourse: Developmental interaction between information processing and linguistic knowledge

In the present study, the discourse interaction between adult and child was examined in terms of the content of their utterances, and the linguistic and contextual relations between their messages, in order to investigate how children use the information from adults' input sentences to form contingent responses. The analyses described were based on longitudinal data from four children from approximately 21 to 36 months of age. Categories of child discourse, their development and their interactions with aspects of prior adult utterances form the major results of the study. Child utterances were identified as adjacent (immediately preceded by an adult utterance), or as nonadjacent (not immediately preceded by an adult utterance). Adjacent utterances were either contingent (shared the same topic and added new information relative to the topic of the prior utterance), imitative (shared the same topic but did not add new information), or noncontingent (did not share the same topic). From the beginning, the adjacent speech was greater than nonadjacent speech. Contingent speech increased over time; in particular, linguistically contingent speech (speech that expanded the verb relation of the prior adult utterance with added or replaced constituents within a clause) showed the greatest developmental increase. Linguistically contingent speech occurred more often after questions than nonquestions. The results are discussed in terms of how the differential requirements for processing information in antecedent messages is related to language learning.     

Offline and online data: on upgrading functional information to knowledge

This paper addresses the problem of upgrading functional information to knowledge. Functional information is defined as syntactically well-formed, meaningful and collectively opaque data. Its use in the formal epistemology of information theories is crucial to solve the debate on the veridical nature of information, and it represents the companion notion to standard strongly semantic information, defined as well-formed, meaningful and true data. The formal framework, on which the definitions are based, uses a contextual version of the verificationist principle of truth in order to connect functional to semantic information, avoiding Gettierization and decoupling from true informational contents. The upgrade operation from functional information uses the machinery of epistemic modalities in order to add data localization and accessibility as its main properties. We show in this way the conceptual worthiness of this notion for issues in contemporary epistemology debates, such as the explanation of knowledge process acquisition from information retrieval systems, and open data repositories.     

Mexican adolescent sexuality: attitudes,knowledge, and sources of information

Data from a study of the attitudes, knowledge, and sources of information of Mexican adolescents are presented. 24 male and 57 female unmarried adolescents of mean age 16.2-16.5 years (range 14-19 years) from Cuernavaca and Guadajara responded to a 66-item questionnaire. Participants were from a broad range of socioeconomic levels and 86% self-identified as being Catholic. 12 males and 4 females had experienced sexual intercourse. Responses to the questionnaire indicate that 85% had received some sex education in school, yet only 8% thought that teachers should be responsible for sex education. Further, the majority were satisfied with what they knew about sex, but the greatest mean score was 5.5 on a series of 9 knowledge questions. The youths were generally conservative, holding that people, especially females, should be married before having sex and that sex without love is unacceptable. The author hopes that these findings will help health education providers plan programs for this population in Mexico and the US.     

Improving the performance of knowledge and information systems

Dick Kuiper, a rural sociologist, is a research associate with the Department of Extension Science, Wageningen, Agricultural University, Hollandseweg, 6706 KN Wageningen, The Netherlands. He is involved in research on agricultural knowledge and information systems.     

The influence of surface color information and color knowledge information in object recognition

In order to clarify whether the influence of color knowledge information in object recognition depends on the presence of the appropriate surface color, we designed a name-object verification task. The relationship between color and shape information provided by the name and by the object photo was manipulated in order to assess color interference independently of shape interference. We tested three different versions for each object: typically colored, black and white, and nontypically colored. The response times on the nonmatching trials were used to measure the interference between the name and the photo. We predicted that the more similar the name and the photo are, the longer it would take to respond. Overall, the color similarity effect disappeared in the black-and-white and nontypical color conditions, suggesting that the influence of color knowledge on object recognition depends on the presence of the appropriate surface color information.