Measuring Unconscious Processes in Visual Word Recognition Using Two-Alternative Forced Choice Tasks in Conjunction with Confidence Ratings and Psychophysiological Recordings

Persistent Link:
http://hdl.handle.net/10150/195906
Title:
Measuring Unconscious Processes in Visual Word Recognition Using Two-Alternative Forced Choice Tasks in Conjunction with Confidence Ratings and Psychophysiological Recordings
Author:
Gorbunova, Anastasia A.
Issue Date:
2009
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The present dissertation aims to evaluate the phenomenon of visual masking as a tool for studying visual awareness focusing on two-alternative forced choice (2AFC) discrimination tasks. Two existing theories of masking - Bachmann's (1984) perceptual retouch theory and Marcel's (1983) recovery theory - are discussed along with the global neuronal workspace theory of awareness (Baars. 1989; Dehaene, Kerszberg, & Changeux, 1998). Performance accuracy on Semantic discrimination is compared to that on Orthographic discrimination as an indication of a potential difference between semantic and orthographic processing of masked word stimuli presented for 40 ms and 50 ms. This is further compared to an e-detection task previously used as an indicator of awareness in some masked priming experiments. Together, these tasks are further evaluated in terms of their relationship with participants' subjective reports collected in the form of confidence ratings. The implications and predictions drawn from the theories of masking and visual awareness as well as the notion of partial awareness (Kouider & Dupoux, 2001) are assessed taking into account the data obtained in the current experiments.The relevance of these data for masked priming is determined by performing a comparison between 2AFC discrimination and detection tasks, and the lexical decision task. An ERP study is also presented, in which Semantic and Orthographic discrimination as well as e-detection are paired with confidence ratings and electrophysiological recordings in search of an ERP component that can be correlated with both subjective (confidence) and objective (performance) measures of awareness. A binding account of visual awareness with special attention paid to visual masking is proposed and compared to the three existing theories.
Type:
text; Electronic Dissertation
Keywords:
event-related potentials; masked priming; masking; two-alternative forced choice; visual awareness; visual word recognition
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Psychology; Graduate College
Degree Grantor:
University of Arizona
Advisor:
Forster, Kenneth I.
Committee Chair:
Forster, Kenneth I.

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleMeasuring Unconscious Processes in Visual Word Recognition Using Two-Alternative Forced Choice Tasks in Conjunction with Confidence Ratings and Psychophysiological Recordingsen_US
dc.creatorGorbunova, Anastasia A.en_US
dc.contributor.authorGorbunova, Anastasia A.en_US
dc.date.issued2009en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe present dissertation aims to evaluate the phenomenon of visual masking as a tool for studying visual awareness focusing on two-alternative forced choice (2AFC) discrimination tasks. Two existing theories of masking - Bachmann's (1984) perceptual retouch theory and Marcel's (1983) recovery theory - are discussed along with the global neuronal workspace theory of awareness (Baars. 1989; Dehaene, Kerszberg, & Changeux, 1998). Performance accuracy on Semantic discrimination is compared to that on Orthographic discrimination as an indication of a potential difference between semantic and orthographic processing of masked word stimuli presented for 40 ms and 50 ms. This is further compared to an e-detection task previously used as an indicator of awareness in some masked priming experiments. Together, these tasks are further evaluated in terms of their relationship with participants' subjective reports collected in the form of confidence ratings. The implications and predictions drawn from the theories of masking and visual awareness as well as the notion of partial awareness (Kouider & Dupoux, 2001) are assessed taking into account the data obtained in the current experiments.The relevance of these data for masked priming is determined by performing a comparison between 2AFC discrimination and detection tasks, and the lexical decision task. An ERP study is also presented, in which Semantic and Orthographic discrimination as well as e-detection are paired with confidence ratings and electrophysiological recordings in search of an ERP component that can be correlated with both subjective (confidence) and objective (performance) measures of awareness. A binding account of visual awareness with special attention paid to visual masking is proposed and compared to the three existing theories.en_US
dc.typetexten_US
dc.typeElectronic Dissertationen_US
dc.subjectevent-related potentialsen_US
dc.subjectmasked primingen_US
dc.subjectmaskingen_US
dc.subjecttwo-alternative forced choiceen_US
dc.subjectvisual awarenessen_US
dc.subjectvisual word recognitionen_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplinePsychologyen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorForster, Kenneth I.en_US
dc.contributor.chairForster, Kenneth I.en_US
dc.contributor.committeememberAllen, John J.B.en_US
dc.contributor.committeememberNicol, Janet L.en_US
dc.contributor.committeememberGlisky, Elizabeth L.en_US
dc.contributor.committeememberGarrett, Merrill F.en_US
dc.identifier.proquest10791en_US
dc.identifier.oclc659753640en_US
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