EOG_slides_week7

EOG_slides_week7 - Correlate the reading speed to the...

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Electrooculography (EOG) Ocular Fixations
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Electrooculogram is a recording of changes in voltage that occur with eye position. The eye acts as a spherical “battery”, with the positive terminal at the cornea and the negative terminal at the retina. Difference between cornea and retina potential is between 0.4-1mV. By placing elctrodes on either ends, it is possible to measure angles up to ± 70 o . [Biopac student lesson10]
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Electrode placement Ground
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Eye behaves as a moving dipole. As the cornea moves closer to the +ve electrode electrode records positive changes. As the cornea moves closer to the -ve electrode electrode records negative changes.
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Part1 Saccades - Reading A saccade is a fast movement of an eye, head or other part of an animal’s body or device. From old French meaning Twitch Eye saccades serve as a mechanism for fixation and rapid eye movement.
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Objective • Compare EOG of speed reading to EOG of attentive reading
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Unformatted text preview: Correlate the reading speed to the retention level Procedure Load h14.gtl Ask the subject to speed read the example text provided in the H14. Ask the subject 2 questions about the text. Note whether answers were correct. Ask the subject to read the text again but attentively. Compare both EOG signals in terms of the number of lines, number of words in each line and finally the duration of the saccade. Part2 Saccades Image Scanning (I-Spy) Load H15.gtl Follow the setup procedure from the Biopac lesson H15.pdf Calibration 2 3 5 4 1 Save your file as Group#_Calibration.acq Find the tomato Soup Can Save your file as Group#_Can.acq Find the Smiley face Save your file as Group#_Smiley.acq Find the bell Save your file as Group#_Bell.acq Example of data alignment ALWAYS refer to your calibration file x-axis (mV) y-axis (mV) Sample# y (mV) (x mV) Aligned data...
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This note was uploaded on 11/14/2011 for the course ECE 3820 taught by Professor Wang during the Fall '11 term at GWU.

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EOG_slides_week7 - Correlate the reading speed to the...

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