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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library

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Image Number K10833-1

Psychophysiologists Roscoe Dykman (foreground) and Terry Pivik review a participant's brain wave (EEG) recording during a reaction-time test.

Photo by Stephen Ausmus.

640 pixels wide: (k10833-1.jpg)

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Last Modified: 5/23/2006
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