Model
Digital Document
Publisher
Florida Atlantic University
Description
The relationship between P300 elicited on a primary counting task
and performance on a secondary signal detection task was examined in a
dual-task paradigm in which the secondary task followed the primary
task by 120 ms. An odd-ball paradigm, utilizing two auditory tones
(Standard and Deviant) was employed as the primary counting task in
order to elicit two states characterized by differences in P300
amplitudes. The standard trials were further categorized according to
their serial position in each series of trials. A signal detection
task in which an auditory tone followed the primary task tones on 50
percent of the trials served as the secondary task. The principal
hypothesis was that a decrease in sensitivity on secondary signal
detection task accompanied Deviant trials in which a P300 was elicited.
Results were consistent with the hypothesis and provided support for
both neural inhibition and cognitive resource allocation models.
and performance on a secondary signal detection task was examined in a
dual-task paradigm in which the secondary task followed the primary
task by 120 ms. An odd-ball paradigm, utilizing two auditory tones
(Standard and Deviant) was employed as the primary counting task in
order to elicit two states characterized by differences in P300
amplitudes. The standard trials were further categorized according to
their serial position in each series of trials. A signal detection
task in which an auditory tone followed the primary task tones on 50
percent of the trials served as the secondary task. The principal
hypothesis was that a decrease in sensitivity on secondary signal
detection task accompanied Deviant trials in which a P300 was elicited.
Results were consistent with the hypothesis and provided support for
both neural inhibition and cognitive resource allocation models.
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