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is look at social position within a group of monkeys,
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looking at the dominant monkeys in social groups
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versus the subordinate monkeys.
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If--those of you who have had any psychology
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will have heard about this kind of thing.
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This is not an infrequently used measure of stress,
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and how social position affects stress and therefore affects
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whatever outcome you're interested in, in this case,
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they were interested in eating.
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What they found here is
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that they compared females in this particular study
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and looked at the dominant versus subordinate ones.