University Of Tasmania
Reynolds_whole_thesis.pdf (6.82 MB)

The multiple threshold race

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posted on 2023-05-27, 09:45 authored by Reynolds, AR
The aim of this thesis is to develop a mathematical method to expand simple binary choice models to account for confidence judgements, with an applied focus on recognition memory experiments. More broadly I aim to set out a mathematical method that allows simple evidence accumulator models to explain more complex decisions where responses can be ordered along a single dimension. As an example: binary decisions can be described as a race between two possible responses but they can also be conceptualised as choosing between either end of a continuum of possible responses. This is most stark in noisy perceptual tasks, e.g. a task to detect if the dots are mostly moving left or moving right. This binary judgement could be extended to include responses like \all the dots are moving left\" \"more dots are moving left than right\" or \"as many dots are moving left as right\". Some judgements do not as naturally translate to a continuum of responses but rather the strength or confidence in the decision. This is a particularly important response in tasks with a strong applied setting such as eye-witness identification."


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Copyright 2021 the author Chapter 2 appears to be the equivalent of a pre-print version of an article published as: Reynolds, A., Garton, R., Kvam, P., Sauer, J., Osth, A. F., Heathcote, A., 2020. A dynamic model of deciding not to choose, Journal of experimental psychology: general, 150(1), 42-66. Copyright American Psychological Association, 2021. This paper is not the copy of record and may not exactly replicate the authoritative document published in the APA journal. The final article is available, upon publication, at: Chapter 4 appears to be the equivalent of a post-print version of an article published as: Reynolds, A., Kvam, P. D., Osth, A. F., Heathcote, A., 2020. Correlated racing evidence accumulator models, Journal of mathematical psychology, 96, 102331.

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