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The impact of attentional and perceptual components on form and motion processing in skilled and poor readers

Liz Conlon and Anne Stuksrud

Griffith University, Australia e.conlon@griffith.edu.au

Abstract

The degree that sensory and 'higher order' perceptual and attentional components contribute to performance on measures of visual temporal processing was investigated. The aim was to determine if the relationship previously found between magnocellular processing and reading can be explained by different events. For example, do more perceptually difficult tasks or tasks with a greater sensory load produce stronger relationships to reading scores. Experiment 1 investigates the way that attentional cues or miscues impact motion coherence thresholds in comparison to a no-cue control condition. In experiment 2 spatial and temporal tasks were conducted. The behavioural nature of the task was manipulated. Skilled and poor readers were required to determine if two sequentially presented stimuli, either two motion stimuli or two pattern stimuli were the same or different. The pattern task matched the perceptual load requirements of the motion task, while using stimuli not processed in the temporal domain. In the final study, a different measure of temporal processing, a rapid sequencing task was conducted. The relationships between the different components of these tasks and reading skills were evaluated. Multiple regression analysis has determined the ways that different temporal components of the task contribute to reading skills. How these finding relate to current explanations of temporal processing in reading will be discussed.

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