2016
DOI: 10.1038/srep30787
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The random dot tachistogram: a novel task that elucidates the functional architecture of decision

Abstract: Reaction times are long and variable, almost certainly because they result from a process that accumulates noisy decision signals over time, rising to a threshold. But the origin of the variability is still disputed: is it because the incoming sensory signals are themselves noisy? Or does it arise within the brain? Here we use a stimulus – the random dot tachistogram – which demands spatial integration of information presented essentially instantaneously; with it, we demonstrate three things. First, that the l… Show more

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Cited by 4 publications
(4 citation statements)
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“…A decrease in the complexity of respiration occurs with aging (64). Similar variability was described for brain function, which persists despite the removal of all temporal noise from the stimulus (65). A reduction in complexity is associated with arthritis, stroke, Parkinson's disease, and Alzheimer's disease (6668).…”
Section: Randomness In Biological Processessupporting
confidence: 62%
“…A decrease in the complexity of respiration occurs with aging (64). Similar variability was described for brain function, which persists despite the removal of all temporal noise from the stimulus (65). A reduction in complexity is associated with arthritis, stroke, Parkinson's disease, and Alzheimer's disease (6668).…”
Section: Randomness In Biological Processessupporting
confidence: 62%
“…The model is most widely applied to tasks in which the stimulus is stochastic, such as the random dot-motion task (Britten et al, 1992), with the variance of response times interpreted as the result of stimulus noise. In this paper, we interpret noise as intrinsic to the encoding process itself, and accordingly the model predicts variance in response times even with non-noisy stimuli (see also Genest et al, 2016 for supporting neural evidence).…”
Section: Discussionmentioning
confidence: 74%
“…Blockage of a vascular branch re-establishes the complexity of vascularization around the affected area by generating shunts (Lipsitz, 1995). Reaction times in the brain are long and variable, as they result from a process that accumulates noisy signals over time, rising to a threshold (Genest et al, 2016). This variability persists despite the removal of all temporal noise from the stimulus, and thus arises from within the nervous system.…”
Section: Applying Randomness and Complexity To Organ Functionmentioning
confidence: 99%