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http://hdl.handle.net/11375/29559
Title: | Exploration of a Bayesian probabilistic model for categorization in the sense of touch |
Other Titles: | Bayesian Categorization in Touch |
Authors: | Gauder, Kyra Alice |
Advisor: | Goldreich, Daniel |
Department: | Psychology |
Keywords: | Bayesian;Bayes;Bayesian perceptual model;Categorization;Sensory noise;Computational model;Haptic touch;Tactile perception;Perception;Touch |
Publication Date: | 2024 |
Abstract: | Categorization is a complex decision-making process that requires observers to collect information about stimuli using their senses. While research on visual or auditory categorization is extensive, there has been little attention given to tactile categorization. Here we developed a paradigm for studying tactile categorization using 3D-printed objects. Furthermore, we derived a categorization model using Bayesian inference and tested its performance against human participants in our categorization task. This model accurately predicted participant performance in our task but consistently outperformed them, even after extending the learning period for our participants. Through theoretical exploration and simulations, we demonstrated that the presence of sensory measurement noise could account for this performance gap, which we determined was a present factor in participants undergoing our task through a follow-up experiment. Including measurement noise led to a better-fitting model that was able to match the performance of our participants much more closely. Overall, the work in this thesis provides evidence for the efficacy of a tactile categorization experimental paradigm, demonstrates that a Bayesian model is a good fit and predictor for human categorization performance, and underscores the importance of accounting for sensory measurement noise in categorization models. |
URI: | http://hdl.handle.net/11375/29559 |
Appears in Collections: | Open Access Dissertations and Theses |
Files in This Item:
File | Description | Size | Format | |
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Gauder_Kyra_A_2024February_PhD.pdf | Kyra Alice Gauder PHD Dissertation Feb 2024 | 4.91 MB | Adobe PDF | View/Open |
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