Title page for ETD etd-07212009-040317


Type of Document Master's Thesis
Author Knebel, Timothy F.
URN etd-07212009-040317
Title EEG theta power during Necker cube reversals
Degree Master of Science
Department Psychology
Advisory Committee
Advisor Name Title
Crawford, Helen J. Committee Chair
Harrison, David W. Committee Member
Prestrude, Albert M. Committee Member
Keywords
  • Visual perception
Date of Defense 1993-06-05
Availability restricted
Abstract

The purpose of this thesis was to investigate a proposed neurophysiological model for Necker cube reversals by using electroencephalography. It is suggested that Necker cube reversals are mediated by sustained focused attention to the overall drawing with visual selective attention to vertices of the cube. The main hypotheses were that deliberate attention would increase Necker cube reversals over passive attention, there would be greater high theta power during the deliberate focusing of attention than during passive attentional processing, and there would be greater theta power in the right hemisphere.

Thirty undergraduate psychology students had monopolar EEG recorded bilaterally from frontal and parietal electrode sites. The subjects viewed computer presentations of the Necker cube under two different experimental conditions: a passive condition in which they were not instructed to influence reversals, and an active condition in which subjects deliberately shifted their focus of attention.

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