Feedback¶

Prime #: 12
Origin domain: Systems Thinking & Cybernetics
Also from: Engineering & Design, Earth Sciences
Aliases: Feedback Loop, Feedback Loops, Positive Feedback, Positive Feedback Loops, Reinforcing Loop, Self Reinforcing Loop, User Feedback, Circular Causality
Related primes: Equilibrium, Self-Organization, State and State Transition

Core Idea¶

Cyclic processes where outputs influence subsequent inputs.

How would you explain it like I'm…

Loop Back

Your body has a little built-in thermostat. If you get too hot, you sweat to cool down. If you get too cold, you shiver to warm up. Your temperature tells your body what to do next, and what your body does changes your temperature, and around and around it goes. That circle, where what's happening now changes what happens next, is feedback.

Output Becomes Next Input

Feedback is when a system listens to itself. The thermostat in your house checks the temperature, turns the heater on if it's cold, and then checks again. If the heat overshoots, it shuts off. The output (warm air) loops back and changes the input (the measured temperature), which changes the next decision. Some loops calm a system down (negative feedback, like the thermostat). Others speed things up out of control (positive feedback, like a microphone screeching near a speaker).

Closed Cause-Effect Loop

Feedback means a system's own output is wired back in as part of its next input, closing a loop between cause and effect. Instead of a one-way chain (A causes B causes C), you get A causes B which loops back to influence A. Negative feedback opposes change and stabilizes a system: a thermostat, your body holding a steady temperature, prices nudging supply and demand toward balance. Positive feedback reinforces change and can run away: a microphone howl, a viral rumor, a snowball rolling downhill. Three knobs matter for any loop: its sign (calming or amplifying), its strength (how much the output pushes back), and its delay (how long the trip around the loop takes).

Feedback is the structural arrangement in which a portion of a system's output is routed back to influence its next input, closing a loop so that the present state depends on the system's prior output, not just external drivers. Every feedback arrangement specifies four things: (1) the variable being measured at the output, (2) the return path that carries that signal back to the input, (3) the sign and strength of coupling (negative feedback opposes the deviation and stabilizes; positive feedback reinforces it and amplifies), and (4) the timescale on which the loop closes. The closure is what defines feedback; without a return path you only have open-loop feedforward. Whether a feedback system converges, oscillates, or diverges depends jointly on the loop's sign, its gain (responsiveness), and its delay. The pattern is ubiquitous: homeostasis in organisms, market clearing, social norm enforcement, autoscaling in software, all rest on it.

Broad Use¶

Key in control systems, ecology, economics, and learning processes.

Clarity¶

Models dynamic systems, e.g., thermostat regulation or market corrections.

Manages Complexity¶

Provides a self-regulating mechanism to adjust systems dynamically.

Abstract Reasoning¶

Encourages cyclical reasoning and understanding of adaptive processes.

Knowledge Transfer¶

Central in engineering (control systems), biology (homeostasis), and economics (supply-demand loops).

Example¶

A thermostat adjusts heating based on the difference between the current temperature and the target temperature.

Relationships to Other Abstractions¶

Current abstraction Feedback Prime

Foundational — no parent edges in the catalog.

Children (78) — more specific cases that build on this

Collateral Squeeze Domain-specific is a kind of Feedback

A Collateral Squeeze is a positive feedback loop specialized to price-linked borrowing capacity, forced sales, and further price declines in a shared collateral market.
Backpressure Prime is a kind of Feedback

Backpressure is a specific negative-feedback loop whose controlled variable is capacity-headroom and whose effect is to throttle production toward the bottleneck rate — a specialization of feedback (the genus, which also covers positive/non-throttling loops).
Broken Windows Theory Prime is a kind of, typical Feedback

Broken windows is a positive-feedback signal-inference-response loop with a density threshold (same algebra as an epidemic R0-crossing) — a specialization of feedback restricted to agents inferring a hidden enforcement-cost regime from observable disorder residue.
Discrepancy-Driven Correction Prime is a kind of Feedback

'feedback's goal-directed specialisation — feedback structured around an explicit target and a signed gap that the action is keyed to.' A strict subspecies of feedback (which has no target).
Niche Construction Prime is a kind of Feedback

Niche_construction is a SPECIALIZATION of feedback where the fed-back variable is specifically the ENVIRONMENT OF SELECTION (which variants are favored), not any state the agent influences.

▸ Show 73 more

Perception Action Loop Prime is a kind of Feedback
The perception-action loop is the specific feedback structure in which 'action moves the sensing apparatus itself' — a constitutive coupling, not merely an error signal.
Action Research Domain-specific is part of Feedback
Action research contains feedback because documented consequences and joint interpretation return to revise both the next practical change and the theory that guides it.
Agenda Building Domain-specific is part of Feedback
The multi-actor agenda process contains a reinforcing Feedback loop in which visibility produces coverage, advocacy, elite response, and further visibility.
Allee Effect Domain-specific is part of Feedback
The Allee effect contains feedback because current conspecific density changes per-capita performance, which changes the next population density fed back into the same relationship.
Biogeochemical Cycle Domain-specific is part of Feedback
Biogeochemical-cycle analysis contains feedback because reservoir stocks and climate variables alter flux rates whose redistribution changes those later stocks and forcings.
Business Cycle Domain-specific is part of, typical Feedback
Standard endogenous business-cycle models typically contain feedback as output, income, investment, collateral, and credit conditions return to change subsequent aggregate activity.
Central Pattern Generator Domain-specific is part of Feedback
Every source-defined CPG mechanism closes an internal state-to-next-state loop, even though external sensory feedback is not required.
Collateral-Damage Blowback Domain-specific is part of Feedback
A delayed reaction channel feeds the peripheral harm back into the initiating actor's future capacity.
Corrections Policy Domain-specific is part of Feedback
A corrections policy contains a closed feedback loop in which detected error acts back on the public claims record through a visible repair.
Direct Manipulation Domain-specific is part of Feedback
Direct Manipulation contains a tight feedback loop in which every incremental action immediately returns a perceptible state change.
Emotional Response Domain-specific is part of Feedback
Interoceptive Feedback is an internal constituent of Emotional Response because physiology and expression return as inputs to the next appraisal.
Entrepreneurial Discovery Domain-specific is part of Feedback
Entrepreneurial Discovery contains Feedback because profit or loss grades the conjecture embodied in action and successful exploitation changes prices and allocations, narrowing the gap that triggered it.
Estuarine Turbidity Maximum Domain-specific is part of Feedback
An estuarine turbidity maximum contains feedback because sediment deposited from one tidal cycle becomes the bed and fluid-mud stock resuspended into the next cycle's suspended input.
Exception Management Domain-specific is part of Feedback
Exception frequency and type are routed upstream so recurring deviations revise the normal-flow specification instead of merely enlarging the exception desk.
Filter bubble Domain-specific is part of Feedback
A filter bubble contains the self-reinforcing loop from served items through engagement signals and model updates back to narrower serving.
Financial Accelerator Domain-specific is part of Feedback
A reinforcing collateral-credit-output loop is the constitutive amplification mechanism inside the financial accelerator.
Flow State Domain-specific presupposes Feedback
Flow state presupposes feedback because the merging of action and awareness requires immediate, continuous return of information about the activity's progress.
Genetic Assimilation Domain-specific is part of Feedback
Genetic Assimilation contains a cross-generation return path from plastic expression through differential reproduction to later expression propensity.
Harrod-Domar Model Domain-specific is part of Feedback
Reinforcing Feedback around the warranted path is the strict mechanism that turns small Harrod–Domar deviations into cumulative expansion or contraction.
Isostasy Domain-specific is part of Feedback
Isostasy contains a delayed negative-feedback loop in which displacement changes buoyant support so the response opposes the applied or removed load.
Janzen-Connell Hypothesis Domain-specific is part of Feedback
Janzen-Connell contains stabilizing feedback because a species' local abundance recruits the specialist-enemy load that lowers its later recruitment.
Karst Domain-specific is part of Feedback
Karst conduit growth contains a reinforcing flow-dissolution feedback.
Malthusian Trap Domain-specific is part of Feedback
A negative population-resource feedback loop is an internal constituent of the trap and restores per-capita welfare toward subsistence after a gain.
Maneuver Warfare Domain-specific is part of Feedback
The OODA competition is a feedback constituent in which observed effects update orientation and subsequent action.
Mark-to-Market Cliff Domain-specific is part of Feedback
The activated consequence feeds back into the same marked reference, pushing it farther beyond the threshold that triggered enforcement.
Market Pull Domain-specific is part of Feedback
Demand signals return to developers and investors and alter which variants are generated, funded, and refined next.
Meander Cutoff Domain-specific is part of Feedback
Meander cutoff contains the reinforcing erosion loop that both enlarges a bend and narrows its neck.
Placemaking Domain-specific is part of Feedback
Placemaking contains feedback because form, recurring use, shared identity, and stewardship route their outputs into one another in a closed mutual-reinforcement circuit.
Responsiveness channel Domain-specific is part of Feedback
Feedback from users or contributors is the information flow the responsiveness channel receives and processes.
Urban Heat Island Domain-specific is part of, typical Feedback
Urban Heat Island typically contains a cooling-demand feedback where HVAC waste heat feeds outdoor temperature upward.

Condition / exception The heat island exists without this loop in pre-HVAC, mild-climate, or weak-cooling contexts.
Uses and Gratifications Domain-specific is part of Feedback
Gratification obtained feeds back into future seeking and retention, making Feedback a strict constituent of the U&G cycle.
Checks and Balances Prime presupposes Feedback
Checks and Balances presupposes Feedback: each branch's checks become inputs to the others' subsequent decisions and behavior.
Circuit Breaker Prime presupposes Feedback
Circuit breaker presupposes feedback because the monitor-trip-reset loop routes the protected flow's state back to control its own continuation.
Communication Repair Prime is part of Feedback
Communication repair contains a feedback loop in which detected divergence is returned through a meta-channel to change the shared state before the primary exchange resumes.
Conditioning (Behavioral) Prime presupposes Feedback
Behavioral conditioning presupposes feedback because learned associations are forged by routing the consequence of a response back to modulate the response itself.
Echo Chamber Prime presupposes Feedback
Echo chamber is constituted by a self-reinforcing positive-feedback loop plus loss of the corrective negative-feedback signal.
External Analytic Challenge Prime is part of Feedback
External analytic challenge contains feedback because its probes must return to alter or explicitly re-justify the next state of the work.
Formative Assessment Prime presupposes Feedback
Formative assessment implements a measure-compare-act feedback loop routing learning evidence back to instruction.
Incentive Prime is part of Feedback
An incentive contains a consequence-to-future-choice feedback path linking payoff signals to subsequent behavior.
Inquiry-Change Learning Loop Prime is part of Feedback
The loop contains feedback because observed consequences must return to alter the next model-guided action.
Instability Prime presupposes Feedback
Instability presupposes feedback because perturbations grow only when an amplification loop routes output back into input.
Lateral Inhibition Prime presupposes Feedback
Lateral inhibition presupposes feedback because peer-to-peer mutual suppression is a closed loop in which each element's activity controls its neighbors' inputs.
Leverage Points Prime presupposes, typical Feedback
Leverage points typically presuppose feedback because the disproportionate effect of small interventions runs through reinforcing or balancing loops.
Livelock Prime is part of Feedback
Livelock contains a coupled feedback loop in which each responsive move elicits the compensating move that sustains non-progress.
Logistic Growth Prime is part of Feedback
Logistic Growth contains the coupled positive engine and negative ceiling brake whose loop interaction produces its sigmoid trajectory.
Metacognition Prime presupposes Feedback
Metacognition is built on a self-monitoring-and-regulation feedback loop over the agent's own cognitive processes.
Monitoring Prime presupposes Feedback
Monitoring is the observe-compare-trigger sensing arm that closes a regulatory feedback loop.
Moral Panic Prime presupposes Feedback
Moral panic presupposes feedback because its self-amplifying wave of concern requires output-to-input loop closure across media, public, and authority.
Potentiation Prime presupposes Feedback
Potentiation presupposes feedback because history-dependent sensitization requires past output to route back and modify the system's response gain.
Predictive Coding Prime presupposes Feedback
Predictive coding presupposes feedback because the predict-compare-correct loop routes prediction-error output back to update the generative model.
Quality Control Prime presupposes Feedback
Quality control is a measure-compare-act feedback gate binding process variation to defined tolerances.
Reference Cadence Exceeds Tracking Bandwidth Prime presupposes Feedback
Reference Cadence Exceeds Tracking Bandwidth presupposes Feedback, whose structure must already obtain for the child mechanism to be meaningful or operational.
Refinement Prime presupposes Feedback
Refinement presupposes feedback because each iterative improvement requires evaluating the current candidate and routing that judgment back to adjust the next pass.
Resonance Prime presupposes Feedback
Resonance presupposes Feedback: amplitude builds because energy returned through the system's own dynamics constructively reinforces the input.
Self-Defeating Prediction Prime presupposes Feedback
Self-Defeating Prediction presupposes Feedback, whose structure must already obtain for the child mechanism to be meaningful or operational.
Spiral Of Silence In Publics Prime presupposes Feedback
Spiral of Silence presupposes the positive feedback loop through which visible suppression changes perceived opinion climate and induces further suppression.
Stability-Induced Fragility Prime presupposes, typical Feedback
A positive-feedback loop running through agents/components inside a system (low volatility -> relaxed vigilance -> raised exposure -> more fragility).
Streisand Effect Prime is part of Feedback
The Streisand effect contains a reinforcing loop in which visible suppression generates attention that further increases the suppressed information's reach.
Stressor Induced Adaptation Prime presupposes Feedback
Stressor-Induced Adaptation presupposes Feedback: applied strain must be sensed and routed back into the system to drive compensatory build-up.
System Archetypes Prime presupposes Feedback
System archetypes presupposes feedback because the recurring problematic dynamics they catalog are characteristic loop structures.
Systems Thinking Prime presupposes Feedback
Systems thinking presupposes feedback because its core analytical move is to model loops and circular causation rather than linear cause–effect chains.
Threshold Bounded Vicious Cycle Prime presupposes, typical Feedback
Feedback is the underlying primitive; this prime SPECIALIZES it by adding a threshold, a two-attractor structure, and active consumption of input as maintenance in the low regime.
Ultra-Stability (Ashby's Concept) Prime presupposes Feedback
Ultra-Stability presupposes Feedback: essential-variable regulation requires measuring deviation and routing it back to drive corrective reorganization.
Validation Prime presupposes Feedback
Validation presupposes Feedback: confirming fitness for purpose requires routing real-world observations back to test the artifact against intended use.
Circular Flow Domain-specific is a decomposition of Feedback
The household-firm loop contains literal return-as-input closure: firms' payments become household income and household expenditure returns as firms' receipts.
Declinism Domain-specific is a decomposition of Feedback
The inflated past steepens the apparent decline, the tilted present supplies a worse slope, and the pessimistic forecast feeds back to confirm the frame that governs later memory and evaluation.
Passivation Domain-specific is a decomposition of Feedback
Surface reaction creates a barrier that suppresses later reaction, closing a sign-opposing loop that converges to a low passive rate.
Validated Learning Domain-specific is a decomposition of Feedback
Build–measure–learn routes observed customer behavior back into the next hypothesis and test, so measured output changes subsequent input and action.
Coevolution Prime is a decomposition of Feedback
Coevolution is the specific shape feedback takes when two adapting entities each become persistent selective pressures on each other.
Network Effect Prime is a decomposition of Feedback
Network effects is the specific shape feedback takes when each new user makes the system more valuable to all existing users, reinforcing further adoption.
Reputation Prime is a decomposition of Feedback
Reputation is the specific shape feedback takes when an agent's prior conduct loops back through third parties to shape future treatment.
Self-Fulfilling Prophecy Prime is a decomposition of Feedback
A self-fulfilling prophecy is the specific shape feedback takes when a belief's expression alters behavior so that the belief is validated.
Speculative Bubble Prime is a decomposition of Feedback
A speculative bubble is the specific shape feedback takes when valuation and expectation of future rises form a self-reinforcing loop that overshoots and collapses.

Not to Be Confused With¶

Feedback is not System Archetypes because Feedback is the general mechanism where system output influences inputs, whereas System Archetypes are recurring pattern structures (like reinforcing loops) within complex systems.
Feedback is not Homeostasis because Feedback is any information flow from output back to input, whereas Homeostasis is a specific type of negative feedback that maintains variables within a stable operating range.
Feedback is not Reflexivity (Self-Reference) because Feedback is information returned from a system's output to its input that influences behavior, whereas Reflexivity is the capacity of an entity to take itself as an object of attention or modification.