Towards a better understanding of the interaction between visual attention, perception and reaching movement

Porat, Lily (2021). Towards a better understanding of the interaction between visual attention, perception and reaching movement. University of Birmingham. M.Sc.

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Abstract

By using both experimental and computational modelling approaches, this thesis presents evidence for continuous feedforward and feedback interactions between attention, perception, and movement. In Chapter 1 we investigate the spatial allocation of visual attention during reaching movements with the hand hidden from view. The results demonstrate proximity of the hand to a difficult-to-detect probe stimulus to increase the detection rate of the probe. As such, this demonstrates continuous proprioceptive feedback of the hand’s location during movement to facilitate the allocation of visual attention and to its location. Complementing the feedback loop from movement to attention, in Chapter 2 we present further evidence for an ongoing feedforward influence of perception on movement. By building a computational model that considers movements to be made up of smaller submovements, we demonstrate perceptual priming to result in smaller numbers of submovements within a reach trajectory. This captures the ongoing feedforward effects of perception on movement. Taken together these experimental and computational modelling findings provide evidence for continuous feedforward and feedback connections between attention, perception, and the motor system, lending support to an integrated theoretical framework of movement.

Type of Work:

Thesis (Masters by Research > M.Sc.)

Award Type:

Masters by Research > M.Sc.

Supervisor(s):