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United States Department of Agriculture

Agricultural Research Service

ARS Photo Library

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Image Number K9630-1

Physiologist Mary Kretsch (right) and registered dietician Monique Derricote demonstrate the Bakan Vigilance Task, which measures the ability to sustain attention.

Photo by Peggy Greb.

640 pixels wide: (k9630-1.jpg)

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Last Modified: 5/23/2006
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