Dynamics of word recognition: new insight from the reach-to-touch paradigm. This project will introduce a new behavioural reach-to-touch paradigm for studying basic cognitive processes such as word recognition. The advantage of this paradigm is that it is able to measure cognitive processes moment-by-moment as they unfold over time. This will provide new insights into the temporal dynamics of basic cognitive processing.
Risky Futures: Toward a Computational Process Model of Risky Inter-Temporal Choice. A lot is known about people’s preferences. People like their rewards now. Most would prefer $10 today than $20 in one month. Risk is also unattractive; a certain $10 is more attractive than a 50 per cent chance of receiving $25. Surprisingly, much less is known about the interaction between delay and risk. That is, relatively little is known about whether people prefer $10 now, or a 50 per cent chance of $50 in ....Risky Futures: Toward a Computational Process Model of Risky Inter-Temporal Choice. A lot is known about people’s preferences. People like their rewards now. Most would prefer $10 today than $20 in one month. Risk is also unattractive; a certain $10 is more attractive than a 50 per cent chance of receiving $25. Surprisingly, much less is known about the interaction between delay and risk. That is, relatively little is known about whether people prefer $10 now, or a 50 per cent chance of $50 in one month. This project will use a combination of experiments and cognitive modelling to examine all three types of choice. The outcome will be a novel computational model that will elucidate the complex interaction between delay and risk, thereby answering an enduring question in the literature: are risk and delay psychologically equivalent?Read moreRead less
Cross-comparison, Validation And Performance Of Computerised Neuropsychological Assessment Devices In The Evaluation Of Mild Cognitive Impairment And Dementia
Funder
National Health and Medical Research Council
Funding Amount
$700,482.00
Summary
With an ageing population and associated increase in dementia there will be increased demand for neuropsychological assessment, with insufficient trained personnel and resources to meet this demand. Computerised tests offer excellent opportunities for large scale implementation of cognitive screening and monitoring of older adults. This is the first study to systematically evaluate and compare several popular computerised neuropsychological assessment devices in elders with and without dementia.
Cognitive Outcome And Therapeutic Interventions For Coronary Artery Disease.
Funder
National Health and Medical Research Council
Funding Amount
$392,104.00
Summary
Dementia is recognized as an increasingly important factor affecting quality of life as people age. Deaths from heart disease are declining, in part due to improved surgical techniques and to the use of less invasive methods to keep arteries open such as coronary stenting. It is now well known that 20 to 60% of patients experience some degree of impairment in thinking ability (cognitive impairment) after cardiac surgery, that this will persist in some of these individuals for years and may incre ....Dementia is recognized as an increasingly important factor affecting quality of life as people age. Deaths from heart disease are declining, in part due to improved surgical techniques and to the use of less invasive methods to keep arteries open such as coronary stenting. It is now well known that 20 to 60% of patients experience some degree of impairment in thinking ability (cognitive impairment) after cardiac surgery, that this will persist in some of these individuals for years and may increase the risk of long-term problems. Cognitive impairment affects people in many ways. While it is not yet known whether the occurrence of cognitive impairment predisposes to dementia, it is thought that Mild Cognitive Impairment (MCI) may do so. We propose to explore the link between MCI and Post Procedural Cognitive Deficit (PPCD) in patients with coronary disease from before the first point of objective diagnosis, i.e. prior to the coronary angiogram, and over a 12-month period, through and subsequent to further treatment interventions such as stenting or cardiac surgery. Our Pilot data suggest that PPCD does indeed occur after angiography, and we propose to identify how long this lasts, whether MCI predisposes to it and whether it is better to wait until it resolves before further interventions are undertaken. In this way we hope to identify the safest treatment strategy for patients with coronary disease that will minimize the occurrence of Cognitive Deficit and possibly longer-term cognitive changes after investigation and treatment for their symptoms.Read moreRead less
Unifying decisions from experience and description. The project aims to answer an enduring question: are separate theories required for decisions from experience and description? For some decisions, potential outcomes and probabilities are known – a gamble offering a 10 per cent chance to win $100 or a 90 per cent chance of nothing, for example. For many others, there is no ‘look-up table’ of probabilities and outcomes and so we must learn them via experience. Intriguingly, risky choices made on ....Unifying decisions from experience and description. The project aims to answer an enduring question: are separate theories required for decisions from experience and description? For some decisions, potential outcomes and probabilities are known – a gamble offering a 10 per cent chance to win $100 or a 90 per cent chance of nothing, for example. For many others, there is no ‘look-up table’ of probabilities and outcomes and so we must learn them via experience. Intriguingly, risky choices made on the basis of described or experienced information differ markedly. This project examines why this divergence occurs. The project plans to test an innovative approach that unifies both types of decisions into a single theoretical framework and provides a suite of empirical and modelling results.Read moreRead less
Toward a unified account of adaptive decision making: learning to search, stop and decide. The quality of decision making, our own and those with influence over us is a fundamental concern. The centrality of this issue means that it is crucial to understand the cognitive processes underlying human decision making. This project will deliver new insights into these processes and make key recommendations for improving decision making.
How do people make uncertain predictions? Exemplar-based and category-based approaches to inductive inference. This project is an innovative experimental and field study of how people reason under uncertainty. The project will broaden our understanding of human reasoning and enhance the reputation of Australian cognitive science.
Making words stick: Lexical consolidation effects in learning to read. To become skilled readers, children need to move from sounding words out to recognising them rapidly via access to rich, long-term memory representations. Little is known about how this transition is achieved, and why some children have difficulty. This project aims to address these questions in a set of learning studies with typically-developing and reading-impaired children, focussing particularly on the long-term consolida ....Making words stick: Lexical consolidation effects in learning to read. To become skilled readers, children need to move from sounding words out to recognising them rapidly via access to rich, long-term memory representations. Little is known about how this transition is achieved, and why some children have difficulty. This project aims to address these questions in a set of learning studies with typically-developing and reading-impaired children, focussing particularly on the long-term consolidation of word representations. The project will explore the role of sleep in promoting the consolidation process, in both children and adults. The findings are expected to directly inform theory and practice in reading acquisition and enhance the treatment of reading difficulties.Read moreRead less
How are beliefs altered by data? Robust Bayesian models for human inductive learning. This project applies state of the art mathematical models to study how people think and reason, and how we can make good guesses about the future. The goal is to understand how the human mind can operate so effectively in real environments, when even the most powerful computers struggle to handle the complexities of everyday learning problems.
Learning and choosing in a complex world. How do people make choices in a complex world? Making good choices requires expertise, but people must often forego rewards in order to acquire this knowledge. This is the essence of an "explore-exploit dilemma": to maximise rewards across a long time frame, people must take the time to explore and learn now. Empirically, this project aims to unify much of the existing psychological literature and extend it to cover richer, more complex problems. Theoret ....Learning and choosing in a complex world. How do people make choices in a complex world? Making good choices requires expertise, but people must often forego rewards in order to acquire this knowledge. This is the essence of an "explore-exploit dilemma": to maximise rewards across a long time frame, people must take the time to explore and learn now. Empirically, this project aims to unify much of the existing psychological literature and extend it to cover richer, more complex problems. Theoretically, the project aims to use tools from machine learning to compare human decision making to optimal planning models.Read moreRead less