This paper presents the results of a pitch accent categorisation simulation which attempts to classify L*H and H*L accents using a psychologically motivated exemplar-theoretic model of categorisation. Pitch accents are represented in terms of six linguistically meaningful parameters describing their shape. No additional information is employed in the categorisation process. The results indicate...

Beyond Affinity Propagation: Message Passing Algorithms for Clustering Inmar-Ella Givoni Doctor of Philosophy Graduate Department of Computer Science University of Toronto 2012 Affinity propagation is an exemplar-based clustering method that takes as input similarities between data points. It outputs a set of data points that best represent the data (exemplars), and assignments of each non-exem...

Exemplar theory was motivated by research that often used D. L. Medin and M. M. Schaffer's (1978) 5/4 stimulus set. The exemplar model has seemed to fit categorization data from this stimulus set better than a prototype model can. Moreover, the exemplar model alone predicts a qualitative aspect of performance that participants sometimes show. In 2 experiments, the authors reexamined these findi...

This thesis investigates the cognitive processes and representations underlying human judgment in a multiple-cue judgment task. Several recent models assume that people have several qualitatively distinct and competing levels of knowledge representations (Ashby, The most successful cognitive models in categorization and multiple-cue judgment are, respectively, exemplar-based models and rule-bas...

Differences in the visual processing of familiar and unfamiliar faces have prompted considerable interest in face learning, the process by which unfamiliar faces become familiar. Previous work indicates that face learning is determined in part by exposure duration; unsurprisingly, viewing faces for longer affords superior performance on subsequent recognition tests. However, there has been furt...

This article describes the phonetic process of post-nasal devoicing in Tswana. We propose a multi-agent exemplar model with various interaction schemes which include factors like functional and social biases in order to account for this counter-intuitive phenomenon. Our novel hybrid multi-agent modeling framework facilitates investigation of sound change by combining the sociophonetic model of ...

In two experiments we examined which cognitive processes people use in a non-linear multiple cue judgment task, proposing that people are not able to use explicit cue abstraction when judging objects with a non-linear structure between the cues of the objects and the criterion and therefore they are forced to use exemplar-based processes. Consistent with the results reveal strong exemplar effec...