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P1 event-related potential component modulations and behavioural inhibitory cueing effects in the presence of a distractor stimulus

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Wilson, NR 2018 , 'P1 event-related potential component modulations and behavioural inhibitory cueing effects in the presence of a distractor stimulus', Honours thesis, University of Tasmania.

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Abstract

Inhibitory cueing effects (ICEs) denote slowed responses to a target stimulus caused by exposure to a cue appearing in the same location and are thought to improve the efficiency of visual search. Research has demonstrated the existence of two types of ICE – those that are generated along input pathways (sensory/perceptual; observed when the oculomotor system is suppressed) and those that are generated along output pathways (oculomotor; observed when the oculomotor system is active). Within a spatial cueing task using oculomotor suppressed (for input ICEs) and oculomotor active (for output ICEs) manipulations, the present study employed electroencephalography to study the effects of input and output ICEs on an early sensory/attentional event-related potential component (the P1) in the presence of a distractor stimulus. This study also explored the effects of ADHD symptomology on ICEs. Results showed ICEs (slower reaction times for cued trials compared to uncued trials) for both suppressed and active manipulations, but no difference in the magnitude of ICEs between the two. Additionally, while there was no overall difference in RTs between deficit and control levels, there was a marginally significant interaction such that controls had a significant ICE, but deficits’ ICEs were marginal. No significant results were observed for P1 analyses. Results, limitations and future directions are discussed.

Item Type: Thesis - Honours
Authors/Creators:Wilson, NR
Keywords: Inhibition of Return, Attentional deficits, Visual search, Sensory adaptation, Spatial Cueing
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Copyright 2018 the author

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