Nicholas J Sexton

Nicholas J Sexton
University College London | UCL · Experimental Psychology

Doctor of Psychology

About

8
Publications
585
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32
Citations

Publications

Publications (8)
Article
Functional correspondences between deep convolutional neural networks (DCNNs) and the mammalian visual system support a hierarchical account in which successive stages of processing contain ever higher-level information. However, these correspondences between brain and model activity involve shared, not task-relevant, variance. We propose a stricte...
Article
Full-text available
How can words shape meaning? Shared labels highlight commonalities between concepts whereas contrasting labels make differences apparent. To address such findings, we propose a deep learning account that spans perception to decision (i.e. labelling). The model takes photographs as input, transforms them to semantic representations through computati...
Preprint
Full-text available
One reason the mammalian visual system is viewed as hierarchical, such that successive stages of processing contain ever higher-level information, is because of functional correspondences with deep convolutional neural networks (DCNNs). However, these correspondences between brain and model activity involve shared, not task-relevant, variance. We p...
Preprint
How can words shape meaning? Shared labels highlight commonalities between concepts whereas contrasting labels make differences apparent. To address such findings, we propose a deep learning account that spans perception to decision (i.e., labelling). The model takes photographs as input, transforms them to semantic representations through computat...
Thesis
Full-text available
Task switching is a behavioural paradigm within cognitive psychology that has been claimed to reflect the activity of high-level cognitive control processes. However, classic behavioural markers such as the (n-1) switch cost have also been shown to reflect a multitude of other cognitive processes. The n-2 repetition paradigm has proven more success...
Article
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Task inhibition (also known as backward inhibition) is an hypothesised form of cognitive inhibition evident in multi-task situations, with the role of facilitating switching between multiple, competing tasks. This article presents a novel cognitive computational model of a backward inhibition mechanism. By combining aspects of previous cognitive mo...
Conference Paper
Full-text available
In task switching, the n-2 repetition cost (informally, the elevation in RT associated with performing a recently abandoned task) is an indicator of residual task-set inhibition. One suggestion is that such inhibition is triggered by conflict between task-set elements. We present a novel computational model instantiating this proposal, by adding ta...
Article
Full-text available
Random number generation (RNG) is a complex cognitive task for human subjects, requiring deliberative control to avoid production of habitual, stereotyped sequences. Under various manipulations (e.g., speeded responding, transcranial magnetic stimulation, or neurological damage) the performance of human subjects deteriorates, as reflected in a numb...

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Project (1)