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Optimal Metacontrast Masking of Chromatic Stimuli With and Without Luminance Cues

Permanent Link: http://ncf.sobek.ufl.edu/NCFE003772/00001

Material Information

Title: Optimal Metacontrast Masking of Chromatic Stimuli With and Without Luminance Cues
Physical Description: Book
Language: English
Creator: Fortner, Beverly
Publisher: New College of Florida
Place of Publication: Sarasota, Fla.
Creation Date: 2007
Publication Date: 2007

Subjects

Subjects / Keywords: Visual Perception
Visual Masking
Metacontrast
Masking
Biopsychology
Psychophysics
Genre: bibliography   ( marcgt )
theses   ( marcgt )
government publication (state, provincial, terriorial, dependent)   ( marcgt )
born-digital   ( sobekcm )
Electronic Thesis or Dissertation

Notes

Abstract: I used metacontrast masking to investigate the spatiotemporal processing of visual information along the magnocellular, parvocellular and koniocellular visual channels. Participants completed a contour discrimination masking task in a hue substitution (HS) condition (which utilized no luminance cues) and a luminance decrement (LD) condition (in which the mask was less luminant than the target or background). The HS condition was supposed to utilize the parvocellular and koniocellular systems, and the LD condition was supposed to utilize the magnocellular, parvocellular and koniocellular systems. I hypothesized that if the RECOD model (Ogmen, 1993) were correct, then the LD condition should elicit optimal masking before the HS condition. If the perceptual retouch theory (Bachmann, 2005) were correct, I suggested that there should be no difference in optimal masking points. The data seem to support the RECOD model, but these data may be misleading because the platform used to conduct these tests was not sophisticated enough to present the stimuli at precise temporal intervals.
Statement of Responsibility: by Beverly Fortner
Thesis: Thesis (B.A.) -- New College of Florida, 2007
Electronic Access: RESTRICTED TO NCF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE
Bibliography: Includes bibliographical references.
Source of Description: This bibliographic record is available under the Creative Commons CC0 public domain dedication. The New College of Florida, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
Local: Faculty Sponsor: Bauer, Gordon

Record Information

Source Institution: New College of Florida
Holding Location: New College of Florida
Rights Management: Applicable rights reserved.
Classification: local - S.T. 2007 F7
System ID: NCFE003772:00001

Permanent Link: http://ncf.sobek.ufl.edu/NCFE003772/00001

Material Information

Title: Optimal Metacontrast Masking of Chromatic Stimuli With and Without Luminance Cues
Physical Description: Book
Language: English
Creator: Fortner, Beverly
Publisher: New College of Florida
Place of Publication: Sarasota, Fla.
Creation Date: 2007
Publication Date: 2007

Subjects

Subjects / Keywords: Visual Perception
Visual Masking
Metacontrast
Masking
Biopsychology
Psychophysics
Genre: bibliography   ( marcgt )
theses   ( marcgt )
government publication (state, provincial, terriorial, dependent)   ( marcgt )
born-digital   ( sobekcm )
Electronic Thesis or Dissertation

Notes

Abstract: I used metacontrast masking to investigate the spatiotemporal processing of visual information along the magnocellular, parvocellular and koniocellular visual channels. Participants completed a contour discrimination masking task in a hue substitution (HS) condition (which utilized no luminance cues) and a luminance decrement (LD) condition (in which the mask was less luminant than the target or background). The HS condition was supposed to utilize the parvocellular and koniocellular systems, and the LD condition was supposed to utilize the magnocellular, parvocellular and koniocellular systems. I hypothesized that if the RECOD model (Ogmen, 1993) were correct, then the LD condition should elicit optimal masking before the HS condition. If the perceptual retouch theory (Bachmann, 2005) were correct, I suggested that there should be no difference in optimal masking points. The data seem to support the RECOD model, but these data may be misleading because the platform used to conduct these tests was not sophisticated enough to present the stimuli at precise temporal intervals.
Statement of Responsibility: by Beverly Fortner
Thesis: Thesis (B.A.) -- New College of Florida, 2007
Electronic Access: RESTRICTED TO NCF STUDENTS, STAFF, FACULTY, AND ON-CAMPUS USE
Bibliography: Includes bibliographical references.
Source of Description: This bibliographic record is available under the Creative Commons CC0 public domain dedication. The New College of Florida, as creator of this bibliographic record, has waived all rights to it worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law.
Local: Faculty Sponsor: Bauer, Gordon

Record Information

Source Institution: New College of Florida
Holding Location: New College of Florida
Rights Management: Applicable rights reserved.
Classification: local - S.T. 2007 F7
System ID: NCFE003772:00001

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