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NEURAL INHIBITION MODEL OF THE P(300) COMPONENT OF THE AVERAGED EVOKED POTENTIAL
Title
A NEURAL INHIBITION MODEL OF THE P(300) COMPONENT OF THE AVERAGED EVOKED POTENTIAL.
Creator
WILLIAMS, CATHY SUZANNE, Florida Atlantic University
Abstract/Description
Visual and auditory evoked potentials were studied in a selective attention paradigm similar to that of Posner and Boies (1971) wherein a visual letter-matching task was interrupted by auditory probes on selected trials. A neural inhibition model of the P300 component was proposed which generated the hypothesis that the P300 component in response to auditory probes would be greatest in amplitude to probes which occurred between the two to-be-remembered test letters and smaller in amplitude to...
Show moreVisual and auditory evoked potentials were studied in a selective attention paradigm similar to that of Posner and Boies (1971) wherein a visual letter-matching task was interrupted by auditory probes on selected trials. A neural inhibition model of the P300 component was proposed which generated the hypothesis that the P300 component in response to auditory probes would be greatest in amplitude to probes which occurred between the two to-be-remembered test letters and smaller in amplitude to probes which occurred before the presentation of the first test letter. General support for the neural inhibition model was found, however, systematically shifting prestimulus baselines were also observed within these time intervals thereby raising the possibility that the differences in P300 amplitudes were due to nonspecific changes in the general arousal level of the subject. It was also found that instruction-induced differences in response speed affected the amplitude of the evoked potential components in a way which could most parsimoniously be attributed to shifts in general arousal.
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Date Issued
1980
PURL
http://purl.flvc.org/fcla/dt/14032
Subject Headings
Evoked potentials (Electrophysiology), Electroencephalography
Format
Document (PDF)
INVESTIGATION OF THE INTRINSIC RELATIONSHIP BETWEEN LEVER PRESSING BEHAVIOR AND FOOD REINFORCEMENT IN RATS
Title
AN INVESTIGATION OF THE INTRINSIC RELATIONSHIP BETWEEN LEVER PRESSING BEHAVIOR AND FOOD REINFORCEMENT IN RATS.
Creator
CHANCE, CATHY A., Florida Atlantic University
Abstract/Description
To determine whether or not lever pressing is intrinsically related to food gathering in rats, five adult male white rats were subjected to one week of DRO training, followed by 42 sessions of fixed time and four no food extinction sessions. They were subsequently given the opportunity to autoshape the lever press response for food. During fixed time, a stable pattern of terminal and interim responses developed, which was disrupted by the extinction trials. Lever pressing occurred as an...
Show moreTo determine whether or not lever pressing is intrinsically related to food gathering in rats, five adult male white rats were subjected to one week of DRO training, followed by 42 sessions of fixed time and four no food extinction sessions. They were subsequently given the opportunity to autoshape the lever press response for food. During fixed time, a stable pattern of terminal and interim responses developed, which was disrupted by the extinction trials. Lever pressing occurred as an interim response. Even after extensive response-independent reinforcement, four of the five animals autoshaped in a single 30 min session, with the remaining animal autoshaping by the third session. It is suggested that lever pressing is indeed a prepared response in rats in a food gathering situation and further, that it is part of a chain of responses that begins with a forepaw manipulatory behavior and terminates with the consumption of the pellet.
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Date Issued
1981
PURL
http://purl.flvc.org/fcla/dt/14060
Subject Headings
Rats--Psychology, Rats--Behavior
Format
Document (PDF)
Backtalk: Visual Language and the Representation of Black Women
Title
Backtalk: Visual Language and the Representation of Black Women.
Creator
Charles, Cathy, Cunningham, Stephanie, Florida Atlantic University, Dorothy F. Schmidt College of Arts and Letters, Department of Visual Arts and Art History
Abstract/Description
For years, black women have endured the mainstream stereotypes of the Mammy, the Jezebel, and the Sapphire. Backtalk is a conversation about black women using their own language translated into a graphic visual language. It examines ways in which black women are active agents in the social scripting of their own identities. Their complexity is visualized using a formal semiotic system based on their individual descriptions. This new visual language allows black women to deconstruct the...
Show moreFor years, black women have endured the mainstream stereotypes of the Mammy, the Jezebel, and the Sapphire. Backtalk is a conversation about black women using their own language translated into a graphic visual language. It examines ways in which black women are active agents in the social scripting of their own identities. Their complexity is visualized using a formal semiotic system based on their individual descriptions. This new visual language allows black women to deconstruct the limiting categorizations mainstream culture allows them, freeing participants from category-based expectations.
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Date Issued
2018
PURL
http://purl.flvc.org/fau/fd/FA00013002
Subject Headings
Women, Black, Backtalk
Format
Document (PDF)