{"id":{"repo_id":"manitoba","oai_identifier":"oai:mspace.lib.umanitoba.ca:1993/32111"},"canonical_url":"https://search.dev.ndltd.org/etd/manitoba/oai:mspace.lib.umanitoba.ca:1993/32111","repository":{"repo_id":"manitoba","name":"University of Manitoba","base_url":"https://mspace.lib.umanitoba.ca/oai/request"},"display":{"title":"Reinterpreting selective impairments in memory: computational and empirical simulations of dissociations in amnesia","abstract":"By a dominant account, memory is composed of multiple storage systems, each operating according to unique principles. By an alternative account, memory is a single storage system and operates according to a single set of principles. Selective memory impairments in amnesia serve as the primary evidence for the multiple-system perspective. This thesis reports a critical appraisal of the multiple-system perspective using a combination of computational and empirical methods. In the computational analysis, I adopt the Holographic Exemplar Model, a single-system model of memory based on Hintzman’s (1986) classic MINERVA2 model. I simulate amnesia by manipulating the quality with which items are encoded in memory. In the empirical analysis, I simulate amnesia by manipulating peoples’ quality of encoding by limiting the time given to study stimuli. Simulations 1-2 and Experiments 1-2 simulate a dissociation between classification and recognition. All four analyses are consistent with the original results. Simulation 3 and Experiment 3 simulate single and double dissociations between tachistoscopic identification and recognition. The analyses were consistent with the single but not double dissociation. Simulation 4 and Experiment 4 simulate a dissociation among word-stem completion, cued recall, and recognition. Both analyses were only partially consistent with the original results, representing a failure overall. Simulation 5 and Experiment 5 derived a novel prediction from artificial grammar learning, predicting a non-dissociation between string completion and recognition. The mixed results provide some support for a single-system account of memory and opens opportunities for future work. I argue that the analysis is best considered in convergence with previous work moving toward a more integrated account of memory","abstract_html":"By a dominant account, memory is composed of multiple storage systems, each operating according to unique principles. By an alternative account, memory is a single storage system and operates according to a single set of principles. Selective memory impairments in amnesia serve as the primary evidence for the multiple-system perspective. This thesis reports a critical appraisal of the multiple-system perspective using a combination of computational and empirical methods. In the computational analysis, I adopt the Holographic Exemplar Model, a single-system model of memory based on Hintzman’s (1986) classic MINERVA2 model. I simulate amnesia by manipulating the quality with which items are encoded in memory. In the empirical analysis, I simulate amnesia by manipulating peoples’ quality of encoding by limiting the time given to study stimuli. Simulations 1-2 and Experiments 1-2 simulate a dissociation between classification and recognition. All four analyses are consistent with the original results. Simulation 3 and Experiment 3 simulate single and double dissociations between tachistoscopic identification and recognition. The analyses were consistent with the single but not double dissociation. Simulation 4 and Experiment 4 simulate a dissociation among word-stem completion, cued recall, and recognition. Both analyses were only partially consistent with the original results, representing a failure overall. Simulation 5 and Experiment 5 derived a novel prediction from artificial grammar learning, predicting a non-dissociation between string completion and recognition. The mixed results provide some support for a single-system account of memory and opens opportunities for future work. I argue that the analysis is best considered in convergence with previous work moving toward a more integrated account of memory","abstract_has_math":false,"creators":["Curtis, Evan"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Jamieson, Randall (Psychology)"],"committee_chairs":[],"committee_members":[],"year":2017,"date_issued":"2017","date_published":"2017","updated_at":"2026-07-24T03:02:05Z","subjects":["Memory","Dissociation","Amnesia","Computational modeling"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1993/32111","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.supervisor","label":"Supervisor","values":["Jamieson, Randall (Psychology)"]},{"key":"dc:creator","label":"Author","values":["Curtis, Evan"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2017-02-07T17:43:02Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2017-02-07T17:43:02Z"]},{"key":"dc:date.issued","label":"Date","values":["2017"]},{"key":"dc:type","label":"Dc Type","values":["doctoral thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Memory","Dissociation","Amnesia","Computational modeling"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1993/32111"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["By a dominant account, memory is composed of multiple storage systems, each operating according to unique principles. By an alternative account, memory is a single storage system and operates according to a single set of principles. Selective memory impairments in amnesia serve as the primary evidence for the multiple-system perspective. This thesis reports a critical appraisal of the multiple-system perspective using a combination of computational and empirical methods. In the computational analysis, I adopt the Holographic Exemplar Model, a single-system model of memory based on Hintzman’s (1986) classic MINERVA2 model. I simulate amnesia by manipulating the quality with which items are encoded in memory. In the empirical analysis, I simulate amnesia by manipulating peoples’ quality of encoding by limiting the time given to study stimuli. Simulations 1-2 and Experiments 1-2 simulate a dissociation between classification and recognition. All four analyses are consistent with the original results. Simulation 3 and Experiment 3 simulate single and double dissociations between tachistoscopic identification and recognition. The analyses were consistent with the single but not double dissociation. Simulation 4 and Experiment 4 simulate a dissociation among word-stem completion, cued recall, and recognition. Both analyses were only partially consistent with the original results, representing a failure overall. Simulation 5 and Experiment 5 derived a novel prediction from artificial grammar learning, predicting a non-dissociation between string completion and recognition. The mixed results provide some support for a single-system account of memory and opens opportunities for future work. I argue that the analysis is best considered in convergence with previous work moving toward a more integrated account of memory"]},{"key":"dc:title","label":"Title","values":["Reinterpreting selective impairments in memory: computational and empirical simulations of dissociations in amnesia"]}]}],"canonical_facts":{"dc:contributor.supervisor":["Jamieson, Randall (Psychology)"],"dc:creator":["Curtis, Evan"],"dc:date.accessioned":["2017-02-07T17:43:02Z"],"dc:date.available":["2017-02-07T17:43:02Z"],"dc:date.issued":["2017"],"dc:description.abstract":["By a dominant account, memory is composed of multiple storage systems, each operating according to unique principles. By an alternative account, memory is a single storage system and operates according to a single set of principles. Selective memory impairments in amnesia serve as the primary evidence for the multiple-system perspective. This thesis reports a critical appraisal of the multiple-system perspective using a combination of computational and empirical methods. In the computational analysis, I adopt the Holographic Exemplar Model, a single-system model of memory based on Hintzman’s (1986) classic MINERVA2 model. I simulate amnesia by manipulating the quality with which items are encoded in memory. In the empirical analysis, I simulate amnesia by manipulating peoples’ quality of encoding by limiting the time given to study stimuli. Simulations 1-2 and Experiments 1-2 simulate a dissociation between classification and recognition. All four analyses are consistent with the original results. Simulation 3 and Experiment 3 simulate single and double dissociations between tachistoscopic identification and recognition. The analyses were consistent with the single but not double dissociation. Simulation 4 and Experiment 4 simulate a dissociation among word-stem completion, cued recall, and recognition. Both analyses were only partially consistent with the original results, representing a failure overall. Simulation 5 and Experiment 5 derived a novel prediction from artificial grammar learning, predicting a non-dissociation between string completion and recognition. The mixed results provide some support for a single-system account of memory and opens opportunities for future work. I argue that the analysis is best considered in convergence with previous work moving toward a more integrated account of memory"],"dc:identifier.uri":["http://hdl.handle.net/1993/32111"],"dc:language.iso":["eng"],"dc:subject":["Memory","Dissociation","Amnesia","Computational modeling"],"dc:title":["Reinterpreting selective impairments in memory: computational and empirical simulations of dissociations in amnesia"],"dc:type":["doctoral thesis"]},"updated_at":"2026-07-24T03:02:05Z"}