Garforth, Jason P.
Executive attention, action selection and attention-based learning in neurally controlled autonomous agents.
The Open University.
Full text available as:
I describe the design and implementation of an integrated neural architecture, modelled on human executive attention, which is used to control both automatic (reactive) and willed action selection in a simulated robot. The model, based upon Norman and Shallice's supervisory attention system, incorporates important features of human attentional control: selection of an intended task over a more salient automatic task; priming of future tasks that are anticipated; and appropriate levels of persistence of focus of attention. Recognising that attention-based learning, mediated by the limbic system, and the hippocampus in particular, plays an important role in adaptive learning, I extend the Norman and Shallice model, introducing an intrinsic, attention-based learning mechanism that enhances the automaticity of willed actions and reduces future need for attentional effort required for dealing with distractions. These enhanced features support a new level of attentional autonomy in the operation of the simulated robot. Some properties of the model are explored using lesion studies, leading to the identification of a correspondence between the behavioural pathologies of the simulated robot and those seen in human patients suffering dysfunction of executive attention.
||2006 Jason P. Garforth
||executive attention; action selection; autonomous robotics; cognitive robotics; adaptive learning; neural network
||Social Sciences > Sociology
||14 Apr 2011 14:52
||14 Apr 2011 21:41
Actions (login may be required)