positive feedback
Noun: 1. A process where the output of a system amplifies or increases its own effect, leading to growth or acceleration: In systems theory, electronics, and biology, "positive feedback" describes a loop where a change in a variable leads to further change in the same direction. It is a self-reinforcing cycle. 2. (Less common in technical contexts) Encouraging or affirming commentary: In general language, it can literally mean feedback that is favorable or approving. However, in technical and scientific discourse, the primary meaning is the self-amplifying process.
Noun (Technical)
- The deafening screech from the microphone was caused by positive feedback in the sound system.
- In climate science, the melting of polar ice reduces the Earth's reflectivity, which is a positive feedback loop that leads to further warming.
- The release of oxytocin during childbirth is a classic example of positive feedback in physiology.
Noun (General)
- While I appreciate the positive feedback on my presentation, I would also like some constructive criticism.
- "Positive feedback loop": This is the most common and precise phrasing, explicitly naming the cyclical, self-reinforcing nature of the process.
- Social media algorithms can create a positive feedback loop, where popular content is promoted and becomes even more popular.
- Reinforcing feedback: A synonym often used in systems thinking.
- Virtuous cycle / Vicious cycle: These are related concepts describing loops with generally beneficial or harmful outcomes, respectively. They often, but not always, involve positive feedback mechanisms.
- Negative feedback: The antonym, describing a process where the output of a system dampens or counteracts changes, promoting stability.
- (Technical) Self-reinforcement, amplification loop, regenerative feedback.
- (General) Praise, favorable comment, affirmation.
- "To enter a positive feedback cycle": To begin a process of self-reinforcing growth or decline.
- The company's success and increased R&D spending entered a positive feedback cycle.
The technical meaning of "positive feedback" is dominant in scientific, engineering, and economic contexts. It is crucial to understand that "positive" here refers to the mathematical sign (adding to the input) and does not necessarily imply a good or desirable outcome. A "positive feedback loop" can lead to destructive outcomes, such as a market crash or system failure. The general meaning (praise) is understandable but can cause confusion in technical discussions.
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feedback in phase with (augmenting) the input
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