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positive feedback |
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positive feedback [′päz·əd·iv ′fēd‚bak] (control systems) Feedback in which a portion of the output of a circuit or device is fed back in phase with the input so as to increase the total amplification. Also known as reaction (British usage); regeneration; regenerative feedback; retroaction (British usage). How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Third, positive feedback loops in an economy may accentuate the influence of random shocks and starting conditions, For example, asset price changes often influence future expectations of similar change and can lead market prices to over or under-shoot -- and in cases of weak countervailing forces, lead to bubbles in asset prices. When women saw that they really were more aroused, their expectations rose, creating a positive feedback loop. A positive feedback loop re-enforces itself at each turn: A falling market in Tokyo causes London stockholders to sell, which causes New York stockholders to panic, and so forth. |
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