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From objects to action: a neuropsychological analysis

Morady, Kamelia (2009)
Ph.D. thesis, University of Birmingham.

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Abstract

This thesis is concerned with the factors that determine the performance of everyday action. Six empirical chapters are subsequently presented. First, I sought to investigate the effects of the presence of distractors and of task load on the performance of everyday life tasks, comparing a patient with ADS and controls operating with a task load (Chapter 2). The data indicate that controls and patients with ADS may suffer different demands. The role of the task schema on ADL was examined in Chapter 3. The results showed that there is a problem in using task schema to drive action under the on-line constraints of performing the action. Relation between object recognition and action was tested in Chapters 4 and 5. I showed that ‘object use’ effect was maintained even when the patients showed impaired semantic access for the objects. The final empirical study (Chapter 7), investigated the role of eye movements on performing an everyday. There were proportionately more unrelated fixations and more fixations concerned with locating objects in the ADS patient than in controls. In addition, eye movements away from objects being used were made earlier in the ADS patient, and toying errors were linked to multiple, brief fixations being made to the object involved. In the final chapter (8), I review the evidence from across the thesis and discuss the implications of the work for understanding both normal and disordered everyday actions. The results not only point to the complexity of processes supporting such actions, but also to the critical interactions between action and attention in such tasks.

Type of Work:Ph.D. thesis.
Supervisor(s):Humphreys, Glyn W.
School/Faculty:Colleges (2008 onwards) > College of Life & Environmental Sciences
Department:School of Psychology, Behavioural Brain Science Centre
Subjects:RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Institution:University of Birmingham
ID Code:454
This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder.
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