Evidence-based improvement of statistical inference practices in psychology and other disciplines. The commonest ways that many researchers currently draw conclusions from their data have been shown to be inefficient, and often used incorrectly. This project will develop new, better statistical representations and software tools for data analysis. It will evaluate and demonstrate the effectiveness of these. Wide adoption of these techniques and tools will enhance the international reputation ....Evidence-based improvement of statistical inference practices in psychology and other disciplines. The commonest ways that many researchers currently draw conclusions from their data have been shown to be inefficient, and often used incorrectly. This project will develop new, better statistical representations and software tools for data analysis. It will evaluate and demonstrate the effectiveness of these. Wide adoption of these techniques and tools will enhance the international reputation and competitiveness of Australian psychological science. Adoption by Australian researchers across the social and behavioural sciences, and in other disciplines including medicine, economics and ecology, will improve the efficiency and effectiveness of Australian research, with consequential wide-ranging benefits to the Australian community.Read moreRead less
The structure and dynamics of social contact for human disease transmission models. The methodological advances of this project will enable new insights in important social research. They will not only add significantly to national capacity in the modelling of complex social systems but they will also yield practical scientific outcomes in a significant policy domain in Australia and overseas. In Australia, response to diseases such as HIV, HCV and TB need new approaches, and the threat of pan ....The structure and dynamics of social contact for human disease transmission models. The methodological advances of this project will enable new insights in important social research. They will not only add significantly to national capacity in the modelling of complex social systems but they will also yield practical scientific outcomes in a significant policy domain in Australia and overseas. In Australia, response to diseases such as HIV, HCV and TB need new approaches, and the threat of pandemic influenza is significant. Read moreRead less
Categorization and Working Memory: Bridging two Pillars of Cognition. Categorization is a fundamental cognitive skill that underlies much expert behavior, including medical diagnosis. A given task often gives rise to widely divergent strategies across individuals, and flawed strategies have been implicated in prediction errors of experts (e.g., bush fire fighters). This project seeks to identify the underlying variables that determine an individual's strategy acquisition by relating working memo ....Categorization and Working Memory: Bridging two Pillars of Cognition. Categorization is a fundamental cognitive skill that underlies much expert behavior, including medical diagnosis. A given task often gives rise to widely divergent strategies across individuals, and flawed strategies have been implicated in prediction errors of experts (e.g., bush fire fighters). This project seeks to identify the underlying variables that determine an individual's strategy acquisition by relating working memory performance to categorization. Working memory is a core cognitive construct that is quite well understood, but its relationship to category learning has so far remained unexplored. Being able to predict the development of categorization strategies can help maximize expert performance.Read moreRead less
A new kind of dynamics for psychology. In order to remain efficient in real-world decisions, people must dynamically monitor and adjust their cognitive processes. This project aims to develop innovative methods and analyses for dynamics in experimental psychology, using standard paradigms in which task parameters are dynamically manipulated. The development of models of dynamic behaviour will advance the science of psychology and serve as a practical measurement tool for individuals.
Are two processes one too many? An investigation of the viability of the dual-process model of recognition memory. Memory is the glue that holds together our lives and personal identities. While psychologists are developing better and more sophisticated accounts of how it works, many deep questions remain. The present research examines some of these questions in relation to how memory can be decomposed into its component processes and how we are to understand these processes. An appropriate unde ....Are two processes one too many? An investigation of the viability of the dual-process model of recognition memory. Memory is the glue that holds together our lives and personal identities. While psychologists are developing better and more sophisticated accounts of how it works, many deep questions remain. The present research examines some of these questions in relation to how memory can be decomposed into its component processes and how we are to understand these processes. An appropriate understanding of these questions is vital to the development of interventions (both psychological and pharmacological) designed to halt or even reverse memory decline associated with normal aging and age-associated brain disease (such as Alzheimer disease).Read moreRead less
Extending Cognitive Models to Account for Individual Differences. Despite their impressive achievements, cognitive models of memory retention, category learning, and stimulus representation usually model people as ?invariants?, concentrating on what makes them the same. This project aims to extend all three types of model to also treat people as ?individuals?, and account for how people are different. Advanced model selection methods will be used to do this in a way that is complete, general, an ....Extending Cognitive Models to Account for Individual Differences. Despite their impressive achievements, cognitive models of memory retention, category learning, and stimulus representation usually model people as ?invariants?, concentrating on what makes them the same. This project aims to extend all three types of model to also treat people as ?individuals?, and account for how people are different. Advanced model selection methods will be used to do this in a way that is complete, general, and principled. The outcome will be a set of new theoretical models, and new algorithms to learn the models from empirical data, that explain the differences between people in remembering, learning and representing information.Read moreRead less
The Development of Speed Skill. The power function has been the unquestioned law linking practice to human response time for 30 years and is the basis for all current theories of human skill acquisition. Our recent work has overturned the power law in favour of an exponential law. This project uses a combination of computer simulation and experimentation with both adults and children to determine the generality of the exponential law and to develop theory that can accommodate it. Developmental ....The Development of Speed Skill. The power function has been the unquestioned law linking practice to human response time for 30 years and is the basis for all current theories of human skill acquisition. Our recent work has overturned the power law in favour of an exponential law. This project uses a combination of computer simulation and experimentation with both adults and children to determine the generality of the exponential law and to develop theory that can accommodate it. Developmental and practice effects will be compared in four fundamental cognitive tasks and new estimation methodologies tested, resulting in quantifiable improvements in education and training practices.Read moreRead less
A longitudinal study of neuropsychological and neuromotor effects of low level manganese exposure. This study will investigate the neuropsychological and neuromotor effects of low level exposure to mangenese particulate. Previous studies have indicated symptomology of high level exposure, but there is contention in the literature regarding the effects of low levels of exposure. Our aim is to refine measures of cumulative exposure and develop a more comprehensive and senstitive testing protocol t ....A longitudinal study of neuropsychological and neuromotor effects of low level manganese exposure. This study will investigate the neuropsychological and neuromotor effects of low level exposure to mangenese particulate. Previous studies have indicated symptomology of high level exposure, but there is contention in the literature regarding the effects of low levels of exposure. Our aim is to refine measures of cumulative exposure and develop a more comprehensive and senstitive testing protocol than has been reported thus far. These measures and protocols will be incorporated into a longitudinal design, which has not been conducted in research studies to date. In addition, a database of exposure variables will be developed to facilitate long-term, accurate research into the effects of the low levels of exposure.Read moreRead less
Multidimensional unfolding: the latitude of acceptance and the structure of the single peaked response process in a multidimensional space. The latitude of acceptance and the operational function that structures the single peaked response process have only recently been understood as central to unidimensional models for the measurement of attitude, preference and choice. They have been neglected in multidimensional models. This project will formalise these two central components in a multidimens ....Multidimensional unfolding: the latitude of acceptance and the structure of the single peaked response process in a multidimensional space. The latitude of acceptance and the operational function that structures the single peaked response process have only recently been understood as central to unidimensional models for the measurement of attitude, preference and choice. They have been neglected in multidimensional models. This project will formalise these two central components in a multidimensional space. The operational function governs the relationship between any item-person distance and the latitude of acceptance defines a multidimensional hyper-sphere within which the more positive response is more likely. The project will articulate and operationalise these models for a range of typical response formats from ranking to pairwise preferences.Read moreRead less
How we recognise the orientation of objects: a combined neurophyschological / eye movement study. Neurophyschological evidence suggests that different visual attributes of objects (e.g. shape vs orientation in space) are processed by independent brain systems. This project aims to investigate this issue systematically, using both neurological patients and normal volunteers. By using sensitive experimental measures, including detailed analyses of subject's eye movements while they view objects, ....How we recognise the orientation of objects: a combined neurophyschological / eye movement study. Neurophyschological evidence suggests that different visual attributes of objects (e.g. shape vs orientation in space) are processed by independent brain systems. This project aims to investigate this issue systematically, using both neurological patients and normal volunteers. By using sensitive experimental measures, including detailed analyses of subject's eye movements while they view objects, this research will provide valuable insights into how the visual system gathers and encodes information about different object attributes.Read moreRead less