The Effects of Ambiguity Tolerance and User Discretion on Spatial Task Performance and Display Choices

Recent improvements in information technologies have led to the creation and advancement of numerous interfaces or visual displays. However, not all innovations in visual representations optimize their users’ decisional performance. This research examines whether granting users discretion improves their decisional accuracy and expedites their decision making, as well as reduces their stress and mental workload. In addition, the current study utilizes an extensive, relatively stable construct in cognitive psychology – ambiguity tolerance – to represent individuals’ openness to complexities and investigates the impacts on those decisional outcomes. The mixed results yield implications for future studies

The Effect of Developmental Factors on the Use of an Electronic Communication Device.

This study addressed a poorly understood variable of voice output communication aid (VOCA) use, namely mnemonic development. Forty children without disabilities, aged from 49 to 60 months, were required to use an IntroTalker (Prentke Romich Company) to participate in a one-on-one storybook reading task with the investigator. They were provided with sixteen messages to use during a scripted reading of The Three Bears. Children could use a trained verbal elaboration strategy or generate their own methods to retrieve messages. Immediate and delayed responses of children under two training methods were compared, and the contribution of developmental factors, including metamemory, were evaluated. In the control method, Direct Instruction (DI), children learned to retrieve messages via an error-free method including simple repetition of a verbal elaboration mnemonic. In the experimental method, Active Problem Solving (APS), children were first led through a series of steps alerting them to the limitations of non-symbolic retrieval strategies and allowing them to make retrieval errors, thus discovered the relative value of various retrieval strategies. Next, they were taught to retrieve the remaining messages in the same way as the DI children. Children with low metamemory skill were less accurate in their retrieval of messages, and produced more Self-corrected Responses when trained under the APS condition. Children receiving APS training showed an initial retrieval advantage on the first story-retelling immediately following training; however, on the second day retrieval by DI subjects matched APS. It was concluded that DI children experienced a de facto active problem-solving condition on the first day, when they produced many errors, thereby enhancing the value of the verbal elaborations they had been trained to use. Effects of perceptual, semantic and syntactic development, and of conflicts between the canonical and experimental Three Bears script were evident. Although the use of a normally developing population is controversial in the area of augmentative communication, the strategy was found to produce valuable insights into the errors made by children. Overall, the task was easy for most of the children, thereby supporting the use of VOCAs with young children

The 1992 Goddard Conference on Space Applications of Artificial Intelligence

The purpose of this conference is to provide a forum in which current research and development directed at space applications of artificial intelligence can be presented and discussed. The papers fall into the following areas: planning and scheduling, control, fault monitoring/diagnosis and recovery, information management, tools, neural networks, and miscellaneous applications

Linking Research and Policy: Assessing a Framework for Organic Agricultural Support in Ireland

This paper links social science research and agricultural policy through an analysis of support for organic agriculture and food. Globally, sales of organic food have experienced 20% annual increases for the past two decades, and represent the fastest growing segment of the grocery market. Although consumer interest has increased, farmers are not keeping up with demand. This is partly due to a lack of political support provided to farmers in their transition from conventional to organic production. Support policies vary by country and in some nations, such as the US, vary by state/province. There have been few attempts to document the types of support currently in place. This research draws on an existing Framework tool to investigate regionally specific and relevant policy support available to organic farmers in Ireland. This exploratory study develops a case study of Ireland within the framework of ten key categories of organic agricultural support: leadership, policy, research, technical support, financial support, marketing and promotion, education and information, consumer issues, inter-agency activities, and future developments. Data from the Irish Department of Agriculture, Fisheries and Food, the Irish Agriculture and Food Development Authority (Teagasc), and other governmental and semi-governmental agencies provide the basis for an assessment of support in each category. Assessments are based on the number of activities, availability of information to farmers, and attention from governmental personnel for each of the ten categories. This policy framework is a valuable tool for farmers, researchers, state agencies, and citizen groups seeking to document existing types of organic agricultural support and discover policy areas which deserve more attention

Rethinking the Cape Town Property Developer: Understanding the local developer's perspective of the City of Cape Town Municipality and comparing this perspective to local Transit-Orientated Development policy constructs of the developer

Purpose – This dissertation investigated the degree to which the City of Cape Town understands a ‘notional' Cape Town property developer within the Transit-Orientated Development (“TOD”) context. This dissertation is not meant to draw a distinction between a right or wrong model of a local property developer, but to investigate what a richer model would look like using alternative economic perspectives that capture the multiplicity of reality and possible TOD policy implications. Design – A literature review was undertaken to understand institutional and behavioural economic frameworks, how each framework relates to the property market, and how to use the frameworks to assist in defining a developer. Further research was conducted to consider the property development process from the perspective of the Complex Adaptive Systems (CAS) framework. The property developer as an actor within the property market was then deconstructed. Alternative approaches to local government involvement in the development industry and the developer's perspective on TOD was also explored. A qualitative, semi-structured localist interview was conducted with nine major developers operating in Cape Town. They were selected because they are likely to participate in catalytic TOD-type projects. The interview aimed to understand their world view and how their lived experience relates to the City of Cape Town municipality. Findings – There is a ‘definition gap' between how the City of Cape Town has defined a developer and the findings of this dissertation. Policy implies a developer has perfect decision-making qualities pursuing maximum profits, whereas this dissertation found that developers tend to be focussed on risk reduction and exhibit satisficing and loss-averse behaviour. There are also those who prefer to build and hold a portfolio of rental properties which are not defined in policy. This type of developer possesses a different outlook and investment behaviour than the one defined in the TOD Strategic Framework. The City of Cape Town does not appreciate its positioning within and its influence on local property market dynamics, as it relates to the ‘rules of the game'. Practical Implications – Without understanding these distinctions, developers may not necessarily, predictably and readily respond to any TOD incentives and levers as set out in the Framework, resulting in policy perpetuating the very spatial inequalities and status quo the City of Cape Town aims to redress

Mitigating Complexity in Air Traffic Control: The Role of Structure-Based Abstractions

Cognitive complexity is a limiting factor on the capacity and efficiency of the Air Traffic Control (ATC) system. A multi-faceted cognitive ethnography approach shows that structure, defined as the physical and informational elements that organize and arrange the ATC environment, plays an important role in helping controllers mitigate cognitive complexity. Key influences of structure in the operational environment and on controller cognitive processes are incorporated into a cognitive process model. Controllers are hypothesized to internalize the structural influences in the form of abstractions simplifying their working mental model of the situation. By simplifying their working mental model, these structure-based abstractions reduce cognitive complexity.FAA grants 96-C-001 and # 06-G-006