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Heidi Keen, a doctoral student at Washington State University pushes the clicker when John -- a grizzly bear -- touches the right color cue with his paw during a congitive bias task test at the Bear Research Center in Pullman, Wash.. Keen's research evaluates the psychological impact of environmental enrichment for grizzly bears. ..(Matt Mills McKnight for The Wall Street Journal)
Heidi Keen, a doctoral student at Washington State University pushes the clicker when John -- a grizzly bear -- touches the right color cue with his paw during a congitive bias task test at the Bear Research Center in Pullman, Wash.. Keen's research evaluates the psychological impact of environmental enrichment for grizzly bears. ..(Matt Mills McKnight for The Wall Street Journal)
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